CN111507627A - Agricultural machinery operation subsidy method based on block chain - Google Patents

Abstract

A method for subsidizing agricultural machinery operations based on blockchain, comprising: official authentication of agricultural machinery owner identity information, authentication of agricultural machinery information, approval of agricultural machinery deep loosening soil preparation operation information, calculation of subsidies for agricultural machinery deep loosening and soil preparation, and deep loosening and soil preparation of agricultural machinery. Approval of the amount of operation subsidies; the officials include, but are not limited to, the official approval department, the official supervision department, the official accounting department, and the subsidy party; among them, the agricultural machinery operation information and agricultural machinery operation subsidy information corresponding to the agricultural machinery owner are added to the block In the blockchain, each block is only allowed to be downloaded and retrieved by the corresponding host and official, and information can only be added by adding new blocks, that is, increasing the length of the chain. The invention utilizes the decentralization, non-forgery, non-fiction, and non-tampering characteristics of the blockchain to prevent subsidy certificate information such as operation depth from being tampered with, and solves the problem of a large amount of computation in node blocks.

Description

A blockchain-based subsidy method for agricultural machinery operations

technical field

The invention relates to a block chain-based agricultural machinery operation subsidy method, which belongs to the technical field of using block chain technology to assist administrative management.

Background technique

At this stage, targeted subsidies for agricultural machinery operations are an effective management method to promote agricultural development in my country. For example, the use of agricultural machinery for the subsoil preparation operation method, the traditional subsoil soil preparation compensation is proofread and collated through the subsoil soil preparation contract, acceptance list, subsidy schedule and other data and data, and subsidies are issued after acceptance, which is cumbersome work, low efficiency, and There is a possibility of data falsification. Blockchain technology is a shared distributed database technology, and its advantages are mainly manifested in three aspects: distributed decentralization, trustless system, immutability and encryption security. Therefore, how to apply cutting-edge blockchain technology to administrative work, reduce management costs, and improve the transparency, authority and efficiency of management has become the goal of those skilled in the art to begin research.

Looking at the existing agricultural machinery subsidy management field for deep loosening and soil preparation, the following specific technical problems still exist:

First of all, due to the large and concentrated amount of agricultural machinery IoT data in the process of deep loosening of agricultural machinery, if the data is directly stored in the block, the calculation of each block is very resource-intensive;

Secondly, the subsidy operation quality evaluation involves the operation depth. The subsidy voucher information should include both the operation trajectory, that is, the GPS information, and also the operation depth. If the operation depth does not meet the standard, no subsidy will be given, so the GPS information of the plot is directly used to carry out Subsidies are unreasonable.

It can be seen from the above that in the field of administrative management of agricultural machinery subsidy, how to introduce blockchain technology to decentralize and achieve the characteristics of non-forgery, non-fiction, and non-tampering, there is no technical report yet.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention discloses a method for subsidizing agricultural machinery operations based on a blockchain.

The technical scheme of the present invention is as follows:

A blockchain-based agricultural machinery operation subsidy method, characterized in that it includes:

The official authentication of the identity information of the agricultural machinery owner, the authentication of the agricultural machinery information, the approval of the information on the deep loosening of the agricultural machinery, the calculation of the subsidy for the deep loosening of the agricultural machinery, and the approval of the amount of the subsidy for the deep loosening of the agricultural machinery; the official includes, but is not limited to Official approval department, official supervision department, official accounting department and subsidy provider;

Among them, the methods for the approval of agricultural machinery deep loosening operation information, the calculation of agricultural machinery deep loosening operation subsidies, and the approval of the subsidy payment amount for agricultural machinery deep loosening operation are: adding the agricultural machinery operation information and agricultural machinery operation subsidy information corresponding to the owner of the agricultural machinery. In the blockchain, each block is only allowed to be downloaded and retrieved by the corresponding owner and official, and information can only be added by adding new blocks, that is, increasing the length of the chain. Nothing in the block can be deleted and changed.

Preferably according to the present invention, the official communicates and connects securely with the owner through the management platform; through the management platform, but not limited to, the official authenticates the identity information of the agricultural machinery owner, the agricultural machinery information, and the deep loosening of the agricultural machinery through the management platform. Approval of operation information, calculation of subsidies for deep loosening of agricultural machinery, and approval of the amount of subsidies for deep loosening of agricultural machinery;

The management platform collects the registration information of the owner, and the registration information includes but is not limited to: the identity information of the owner of the agricultural machine and the information of the agricultural machine belonging to the owner of the agricultural machine; the official confirms the identity information of the owner of the agricultural machine and the information of the agricultural machine through the management platform. , respectively form the owner account and the owner ID, the owner account is the only data subject to {agricultural machinery owner identity information}, and the owner ID is the unique data subject to {agricultural machinery owner identity information, agricultural machinery information} Data; the agricultural machine owner logs in to the management platform with the machine owner account each time, and selects the agricultural machine whose operation information needs to be updated under his account. The menu selected at this time is the identity information of the agricultural machine owner, and the subset menu is the agricultural machine information, that is, the unique information is formed. host ID;

The blockchain includes an agricultural machinery operation block and an agricultural machinery operation subsidy block; the agricultural machinery operation block includes a block header and a block body, and the block header includes a machine owner ID and a compound stamp, and the block body Including the operation track, operation depth, operation time and effective operation area corresponding to the agricultural machinery under the owner ID; the agricultural machinery operation subsidy block includes a block header and a block body, and the block header includes the owner ID and time stamp , and the block body includes the corresponding subsidy amount and subsidy issuance date under the owner ID.

According to the preferred embodiment of the present invention, the agricultural machinery subsoil soil preparation operation information includes an operation certificate, including at least the owner ID, the operation track corresponding to the agricultural machinery under the owner ID, the operation depth, the operation time and the effective operation area; the agricultural machinery owner passes The management platform uploads the subsidy voucher, the management platform generates a hash code from the subsidy voucher and the host ID, and the subsidy voucher and the hash code form an identification subsidy voucher;

The official approval department conducts approval through the management platform:

At any time node before, during or after the approval, the management platform searches the hash code in the database; wherein, the database at least includes the approved subsidy voucher and the corresponding hash code;

When the search result is: the same subsidy voucher already exists in the database, the search result is: the same subsidy voucher already exists;

When the search result is: there is no identical subsidy voucher in the database, the search result is: no identical subsidy voucher;

Determine whether to store the corresponding hash code in the database according to the above search results and official approval results:

When the official approval is qualified, and the search result is that there is no identical subsidy certificate, the subsidy certificate uploaded by the agricultural machinery owner and the corresponding hash code are stored in the database, and the agricultural machinery owner is fed back through the management platform. Successful upload prompt;

When the official approval is unqualified, and/or the search result is that the same subsidy certificate already exists, the agricultural machinery owner will be fed back through the management platform that the upload failed;

The hash code corresponding to the above deposited subsidy certificate, together with the compound stamp and the owner ID, are stored in the agricultural machinery operation block in the blockchain;

The official accounting department retrieves and downloads the hash value corresponding to the subsidy certificate from the database, and finally sends the subsidy file loaded with the subsidy amount and the agricultural machinery owner information to the subsidy issuer, and the subsidy issuer calculates the hash value of the subsidy file, The owner ID and timestamp are sent to the agricultural machinery operation subsidy block, and the subsidy issuer will finally issue the subsidy to the agricultural machinery owner's capital account.

Preferably according to the present invention, for the process of storing the subsidy vouchers uploaded by the agricultural machinery owner and the corresponding hash codes into the database, the official supervision department randomly conducts random inspections on the subsidy vouchers, if the subsidy vouchers are found to fail to meet the approval conditions after the sampling inspection If it meets the approval conditions, the corresponding subsidy certificate will be permanently stored in the database and uploaded to the blockchain network.

According to a preferred embodiment of the present invention, the farm machine owner uses a re-hash method to identify the uploaded job subsidy certificate and the machine owner ID on the management platform. The re-hash method is to construct two different hash functions at the same time, H1=RH1(key), H2=RH2(key). In the table, if there is still a conflict in H2, the conflict can be resolved with the help of timestamp and host ID. This method not only reduces the computation amount of {Universal Rehashing} multiple hashes, but also avoids collisions quickly.

According to a preferred embodiment of the present invention, at any time node before, during or after the approval, the management platform searches the hash code in the database means searching the code of the re-hash table in the database.

According to a preferred embodiment of the present invention, the management platform further includes a client, and the farm machine owner and the official log in to the official platform through their respective clients through their respective login accounts; the management platform further includes a server, which is uploaded to the official approval department through the server.

According to the preferred embodiment of the present invention, a smart contract is loaded in the server, and the smart contract is loaded with an official subsidy calculation standard formula: the agricultural machinery operation information in the subsidy certificate is calculated according to the official subsidy calculation standard formula to calculate the final work to be subsidized. data, hash it and save it in the database. The job data to be subsidized is the main basis for calculating the subsidy amount. Among them, a smart contract refers to a computer agreement that disseminates, verifies or executes the contract in an information-based manner. Here, the subsidy standards and calculation formulas issued by the state are mainly written in the smart contract. inside. The off-chain computing method is adopted here, mainly to solve the problem of large amount of block data and resource-consuming computing mentioned above.

The technical advantages of the present invention are:

The invention uses the distributed storage and consensus mechanism of the blockchain to prevent subsidy certificate information such as operation depth from being tampered with, and applies it to at least four subsidy qualification certification, subsidy filing, subsidy management, and subsidy supervision in the subsidy field of deep loosening operations. The key links of loose work subsidies and information transparency have greatly reduced the phenomenon of violations of laws and regulations and improved work efficiency.

The method of the invention utilizes the blockchain smart contract to solve the problems of troublesome verification and examination of proof materials and consuming human resources, and provides a technical means for the digitization of compensation for deep loosening and soil preparation of agricultural machinery.

Due to the centralized and large amount of data of the agricultural machinery Internet of Things, if all the data are uploaded to the blockchain, the block calculation will be greatly reduced, and the efficiency will be reduced. In addition, the distributed storage space is limited, and many intermediate data waste storage space. In order to solve the above problems, the present invention adopts The off-chain computing method is used for processing, and only key information is uploaded to the blockchain database.

In the present invention, the re-hashing method is simplified and applied to the above-mentioned retrieval function in combination with practical application, so as to reduce collision and improve retrieval efficiency.

Description of drawings

1 is a schematic structural diagram of a basic communication platform for agricultural machinery operation subsidies in an embodiment of the present invention;

2 is a schematic diagram of the workflow of the agricultural machinery operation subsidy platform in an embodiment of the present invention;

3 is a schematic diagram of the structure of a blockchain for agricultural machinery operation information in an embodiment of the present invention;

4 is a schematic diagram of a blockchain structure of agricultural machinery operation subsidy information in an embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in Figure 1-4.

Embodiment 1,

The subsidy for agricultural machinery operations described in this embodiment refers to the uploading, approval, calculation and review, and subsidy fund distribution for subsidy vouchers for deep loosening and soil preparation of agricultural machinery. The specific implementation is as follows:

A blockchain-based subsidy method for agricultural machinery operations, including:

The official authentication of the identity information of the agricultural machinery owner, the authentication of the agricultural machinery information, the approval of the information on the deep loosening of the agricultural machinery, the calculation of the subsidy for the deep loosening of the agricultural machinery, and the approval of the amount of the subsidy for the deep loosening of the agricultural machinery; the official includes, but is not limited to Official approval department, official supervision department, official accounting department and subsidy provider;

Among them, the methods for the approval of agricultural machinery deep loosening operation information, the calculation of agricultural machinery deep loosening operation subsidies, and the approval of the subsidy payment amount for agricultural machinery deep loosening operation are: adding the agricultural machinery operation information and agricultural machinery operation subsidy information corresponding to the owner of the agricultural machinery. In the blockchain, each block is only allowed to be downloaded and retrieved by the corresponding owner and official, and information can only be added by adding new blocks, that is, increasing the length of the chain.

The said official conducts secure communication and connection with the owner through the management platform; through the management platform, but not limited to, the official through the management platform authenticates the identity information of the agricultural machinery owner, the agricultural machinery information, the agricultural machinery deep loosening and soil preparation operation information, and the agricultural machinery. Calculation of subsidy for deep loosening and soil preparation, and approval of the amount of subsidy for deep loosening of agricultural machinery;

The management platform collects the registration information of the owner, and the registration information includes but is not limited to: the identity information of the owner of the agricultural machine and the information of the agricultural machine belonging to the owner of the agricultural machine; the official confirms the identity information of the owner of the agricultural machine and the information of the agricultural machine through the management platform. , respectively form the owner account and the owner ID, the owner account is the unique data subject to {agricultural machinery owner identity information}, and the owner ID is the unique data subject to {agricultural machinery owner identity information, agricultural machinery information} Data; the agricultural machine owner logs in to the management platform with the machine owner account each time, and selects the agricultural machine whose operation information needs to be updated under his account. The menu selected at this time is the identity information of the agricultural machine owner, and the subset menu is the agricultural machine information, that is, the unique information is formed. host ID;

As shown in Figures 3 and 4. The blockchain includes an agricultural machinery operation block and an agricultural machinery operation subsidy block; the agricultural machinery operation block includes a block header and a block body, and the block header includes a machine owner ID and a compound stamp, and the block body Including the operation track, operation depth, operation time and effective operation area corresponding to the agricultural machinery under the owner ID; the agricultural machinery operation subsidy block includes a block header and a block body, and the block header includes the owner ID and time stamp , and the block body includes the corresponding subsidy amount and subsidy issuance date under the owner ID.

as shown in picture 2. The agricultural machinery subsidizing operation information includes an operation certificate, including at least the owner ID, the operation track, operation depth, operation time and effective operation area corresponding to the agricultural machinery under the owner ID; the agricultural machinery owner uploads the subsidy certificate through the management platform, The management platform generates a hash code from the subsidy voucher and the host ID, and the subsidy voucher and the hash code form an identification subsidy voucher;

The official approval department conducts approval through the management platform:

At any time node before, during or after the approval, the management platform searches the hash code in the database; wherein, the database at least includes the approved subsidy voucher and the corresponding hash code;

When the search result is: the same subsidy voucher already exists in the database, the search result is: the same subsidy voucher already exists;

When the search result is: there is no identical subsidy voucher in the database, the search result is: no identical subsidy voucher;

Determine whether to store the corresponding hash code in the database according to the above search results and official approval results:

When the official approval is qualified, and the search result is that there is no identical subsidy certificate, the subsidy certificate uploaded by the agricultural machinery owner and the corresponding hash code are stored in the database, and the agricultural machinery owner is fed back through the management platform. Successful upload prompt;

When the official approval is unqualified, and/or the search result is that the same subsidy certificate already exists, the agricultural machinery owner will be fed back through the management platform that the upload failed;

The hash code corresponding to the above deposited subsidy certificate, together with the compound stamp and the owner ID, are stored in the agricultural machinery operation block in the blockchain;

The official accounting department retrieves and downloads the hash value corresponding to the subsidy certificate from the database, and finally sends the subsidy file loaded with the subsidy amount and the agricultural machinery owner information to the subsidy issuer, and the subsidy issuer calculates the hash value of the subsidy file, The owner ID and timestamp are sent to the agricultural machinery operation subsidy block, and the subsidy issuer will finally issue the subsidy to the agricultural machinery owner's capital account.

Embodiment 2,

A method for subsidizing agricultural machinery operations based on blockchain, comprising: official authentication of agricultural machinery owner identity information, authentication of agricultural machinery information, approval of agricultural machinery deep loosening soil preparation operation information, calculation of subsidies for agricultural machinery deep loosening and soil preparation, and deep loosening and soil preparation of agricultural machinery. Approval of the amount of work subsidies to be issued; the authorities include, but are not limited to, the official approval department, the official supervision department, the official accounting department and the subsidy issuing party;

Among them, the methods for the approval of agricultural machinery deep loosening operation information, the calculation of agricultural machinery deep loosening operation subsidies, and the approval of the subsidy payment amount for agricultural machinery deep loosening operation are: adding the agricultural machinery operation information and agricultural machinery operation subsidy information corresponding to the owner of the agricultural machinery. In the blockchain, each block is only allowed to be downloaded and retrieved by the corresponding owner and official, and information can only be added by adding new blocks, that is, increasing the length of the chain.

The said official conducts secure communication and connection with the owner through the management platform; through the management platform, but not limited to, the official through the management platform authenticates the identity information of the agricultural machinery owner, the agricultural machinery information, the agricultural machinery deep loosening and soil preparation operation information, and the agricultural machinery. Calculation of subsidy for deep loosening and soil preparation, and approval of the amount of subsidy for deep loosening of agricultural machinery;

The management platform collects the registration information of the owner, and the registration information includes but is not limited to: the identity information of the owner of the agricultural machine and the information of the agricultural machine belonging to the owner of the agricultural machine; the official confirms the identity information of the owner of the agricultural machine and the information of the agricultural machine through the management platform. , respectively form the owner account and the owner ID, the owner account is the unique data subject to {agricultural machinery owner identity information}, and the owner ID is the unique data subject to {agricultural machinery owner identity information, agricultural machinery information} data;

As shown in Figures 3 and 4. The blockchain includes an agricultural machinery operation block and an agricultural machinery operation subsidy block; the agricultural machinery operation block includes a block header and a block body, and the block header includes a machine owner ID and a compound stamp, and the block body Including the operation track, operation depth, operation time and effective operation area corresponding to the agricultural machinery under the owner ID; the agricultural machinery operation subsidy block includes a block header and a block body, and the block header includes the owner ID and time stamp , and the block body includes the corresponding subsidy amount and subsidy issuance date under the owner ID.

as shown in picture 2. The agricultural machinery subsidizing operation information includes an operation certificate, including at least the owner ID, the operation track, operation depth, operation time and effective operation area corresponding to the agricultural machinery under the owner ID; the agricultural machinery owner uploads the subsidy certificate through the management platform, The management platform generates a hash code from the subsidy voucher and the host ID, and the subsidy voucher and the hash code form an identification subsidy voucher;

The official approval department conducts approval through the management platform:

At any time node before, during or after the approval, the management platform searches the hash code in the database; wherein, the database at least includes the approved subsidy voucher and the corresponding hash code;

When the search result is: the same subsidy voucher already exists in the database, the search result is: the same subsidy voucher already exists;

When the search result is: there is no identical subsidy voucher in the database, the search result is: no identical subsidy voucher;

Determine whether to store the corresponding hash code in the database according to the above search results and official approval results:

When the official approval is qualified, and the search result is that there is no identical subsidy certificate, the subsidy certificate uploaded by the agricultural machinery owner and the corresponding hash code are stored in the database, and the agricultural machinery owner is fed back through the management platform. Successful upload prompt;

When the official approval is unqualified, and/or the search result is that the same subsidy certificate already exists, the agricultural machinery owner will be fed back through the management platform that the upload failed;

The hash code corresponding to the above deposited subsidy certificate, together with the compound stamp and the owner ID, are stored in the agricultural machinery operation block in the blockchain;

The official accounting department retrieves and downloads the hash value corresponding to the subsidy certificate from the database, and finally sends the subsidy file loaded with the subsidy amount and the agricultural machinery owner information to the subsidy issuer, and the subsidy issuer calculates the hash value of the subsidy file, The owner ID and timestamp are sent to the agricultural machinery operation subsidy block, and the subsidy issuer will finally issue the subsidy to the agricultural machinery owner's capital account.

Sampling steps as shown in Figure 2: For the process of storing the subsidy vouchers uploaded by the agricultural machinery owner and the corresponding hash codes into the database, the official supervision department randomly checks the subsidy vouchers. If the approval conditions are met, the platform will delete the corresponding subsidy vouchers. If the approval conditions are met, the corresponding subsidy vouchers will be permanently stored in the database and uploaded to the blockchain network.

According to a preferred embodiment of the present invention, the farm machine owner uses a re-hash method to identify the uploaded job subsidy certificate and the machine owner ID on the management platform.

According to a preferred embodiment of the present invention, at any time node before, during or after the approval, the management platform searches the hash code in the database means searching the code of the re-hash table in the database.

The management platform further includes a client, and the farm machine owner and the official log in to the official platform through their respective login accounts through their respective clients; the management platform further includes a server, which is uploaded to the official approval department through the server.

Embodiment 3,

According to a blockchain-based agricultural machinery operation subsidy method described in Embodiments 1 and 2, a smart contract is loaded in the server, and an official subsidy calculation standard formula is loaded in the smart contract: The agricultural machinery operation information calculates the final subsidy operation data according to the official subsidy calculation standard formula, hash-codes it and saves it in the database.

Specifically, the effective operation area is calculated from the operation trajectory and operation depth in the subsidy voucher, and is hashed and stored in the database. The effective operating area is the main basis for calculating the subsidy amount. Among them, a smart contract refers to a computer protocol that disseminates, verifies or executes the contract in an information-based manner. Here, the subsidy standards and calculation formulas issued by the state are mainly written in the smart contract. The off-chain computing method is adopted here, mainly to solve the problem of large amount of block data and resource-consuming computing mentioned above.

The specific application example in conjunction with embodiment 1-3 is as follows:

A blockchain-based subsidy method for deep loosening of agricultural machinery, which builds a basic management platform to facilitate the distribution of subsidy between government agencies and machine owners. Figure 1 shows the schematic diagram of the basic communication platform for agricultural machinery operation subsidies, which realizes secure communication and connection between government agencies and the owner. in the blockchain. Figure 2 shows a schematic diagram of the work flow of the agricultural machinery operation subsidy platform. The specific work steps are as follows:

S1: The agricultural machine owner registers or logs in to the client, and the client uses the re-hash method to identify the uploaded job subsidy certificate;

S2: The job subsidy certificate identified by the hash code is uploaded to the government approval department for approval through the server;

S3: The job subsidy certificate successfully approved by the government will automatically retrieve the code of the re-hash table in the database, and the file that has not passed the approval will be prompted to upload failure;

S4: The database returns the search results to the government approval department, and the government approval department sends the qualified job subsidy certificate to the government supervision department;

S5: The government supervision department conducts on-the-spot inspection on the job subsidy certificate by manual random inspection, and the qualified job subsidy certificate is permanently stored in the database;

S6: The server automatically calculates the effective operation area by combining the operation trajectory and the operation depth through the smart contract, and hash-codes it and saves it in the database;

S7: Add the hash value of the job subsidy certificate, the hash value of the valid job area, the compound stamp (time + address), and the owner ID to the upload list, and publish it to the blockchain network.

S8: The government accounting department enters the hash code to query and download the uploaded operation voucher and effective operation area, the database permanently saves the download record, and then calculates the amount of subsidy to be paid according to the effective operation area, and forms a subsidy file after accounting.

S9: The client uses the re-hashing method to encode and identify the subsidy file after accounting, upload it to the government approval department through the server, and send the successfully approved subsidy file after accounting to the bank for subsidy transfer.

S10: Add the transfer timestamp, the hash value of the subsidy file after accounting, and the owner ID to the upload list and upload it to the blockchain network.

FIG. 3 is a schematic diagram of the blockchain structure of agricultural machinery operation information, and FIG. 4 is a schematic diagram of the blockchain structure of agricultural machinery operation subsidy information. Taking the agricultural machinery subsidy blockchain as an example, the following will introduce the verification mechanism of the blockchain-based agricultural machinery subsidy platform in detail. The specific steps are as follows:

S1: The owner uploads a piece of fake agricultural machinery subsoil operation information a*, and the information is re-hashed to obtain the hash value h(a*);

S2: Broadcast h(a*) to each block receiver, and the receiver retrieves the hash value h(a) of the real file a according to the composite stamp and host ID information;

S3: Comparing h(a*) and h(a), the two files are different, and the fake file upload fails.

Claims (8)

1. An agricultural machinery operation subsidy method based on a block chain is characterized by comprising the following steps:

the official part authenticates the information of the master identity of the agricultural machine, authenticates the information of the agricultural machine, approves the information of the deep-loosening and soil-preparation operation of the agricultural machine, calculates the subsidy of the deep-loosening and soil-preparation operation of the agricultural machine and approves the issued amount of the subsidy of the deep-loosening and soil-preparation operation of the agricultural machine; the authorities include, but are not limited to, official approval departments, official regulatory departments, official accounting departments, and subsidy issuing parties;

the method for approving the information of the deep scarification and soil preparation operation of the agricultural machine, the calculation of the subsidy of the deep scarification and soil preparation operation of the agricultural machine and the approval of the issued amount of the subsidy of the deep scarification and soil preparation operation of the agricultural machine is as follows: agricultural machinery operation information and agricultural machinery operation subsidy information corresponding to the agricultural machinery main are newly added to the block chain, in the block chain, each block only allows the corresponding main and official to download and retrieve, and only the information can be newly added through the newly added block, namely, the length of the chain is increased.

2. The patch chain-based agricultural machinery work subsidy method of claim 1, wherein the official party is in secure communication and connection with the owner through a management platform; by the management platform, but not limited to, an official part authenticates the master identity information of the agricultural machine, authenticates the information of the agricultural machine, approves the deep-loosening and soil-preparation operation information of the agricultural machine, calculates subsidies of the deep-loosening and soil-preparation operation of the agricultural machine and approves the issued amount of the subsidies of the deep-loosening and soil-preparation operation of the agricultural machine through the management platform;

the management platform collects owner registration information, which includes but is not limited to: agricultural machinery master identity information and agricultural machinery information belonging to the agricultural machinery master; the method comprises the following steps that an official part carries out official confirmation on agricultural machinery main identity information and agricultural machinery information through a management platform to form a main account and a main ID respectively, wherein the main account is unique data based on { agricultural machinery main identity information }, and the main ID is unique data based on { agricultural machinery main identity information, agricultural machinery information };

the block chain comprises an agricultural machine operation block and an agricultural machine operation subsidy block; the agricultural machine operation block comprises a block head and a block body, wherein the block head comprises a machine owner ID and a composite stamp, and the block body comprises an operation track, an operation depth, an operation time and an effective operation area corresponding to the agricultural machine under the machine owner ID; the agricultural machinery operation subsidy block comprises a block head and a block body, the block head comprises a machine owner ID and a timestamp, and the block body comprises a subsidy amount and a subsidy issuing date corresponding to the machine owner ID.

3. The patch method for agricultural machinery operation based on the block chain as claimed in claim 1 or 2, wherein the agricultural machinery deep scarification and land preparation operation information comprises operation credentials, at least comprising a main machine ID, an operation track corresponding to the agricultural machinery under the main machine ID, an operation depth, an operation time and an effective operation area; the agricultural machine owner uploads a subsidy certificate through a management platform, the management platform generates a hash code from the subsidy certificate and the owner ID, and the subsidy certificate and the hash code form an identification subsidy certificate;

the official approval department carries out approval through a management platform:

the management platform searches the hash code in a database after the approval passes any time node before, during or after the approval; the database at least comprises subsidy certificates which are approved and corresponding hash codes;

when the retrieval result is: when the same subsidy voucher exists in the database, the retrieval result is as follows: the same subsidy certificate already exists;

when the retrieval result is: if the same subsidy voucher does not exist in the database, the retrieval result is as follows: no same subsidy voucher exists;

and determining whether to store the corresponding hash code into the database or not by combining the retrieval result and the official approval result:

when the official approval is qualified and the retrieval result is that the same subsidy voucher does not exist, storing the subsidy voucher uploaded by the agricultural owner and the corresponding hash code into the database, and feeding back a prompt of successful uploading of the agricultural owner through the management platform;

when the officer is unqualified in examination and approval and/or the retrieval result is that the same subsidy voucher exists, feeding back a prompt of the agricultural owner uploading failure through the management platform;

the hash codes corresponding to the stored subsidy certificates are stored into an agricultural machinery operation block in a block chain together with the composite stamp and the owner ID;

the official accounting department calls and downloads the hash value corresponding to the subsidy certificate from the database, finally sends the subsidy file loaded with the subsidy amount and the main information of the agricultural machine to the subsidy issuing party, the subsidy issuing party calculates the hash value, the main ID and the timestamp of the subsidy file and sends the calculated hash value, the main ID and the timestamp of the subsidy file to an agricultural machine operation subsidy block, and finally the subsidy issuing party issues the subsidy to a main fund account of the agricultural machine.

4. The agricultural machinery operation subsidy method based on the block chain as claimed in claim 3, wherein aiming at the process of storing the subsidy voucher uploaded by the agricultural machinery owner and the corresponding hash code into the database, an official supervision department randomly performs spot check on the subsidy voucher, deletes the corresponding subsidy voucher if the subsidy voucher does not meet the examination and approval conditions after spot check, and permanently stores the corresponding subsidy voucher into the database and uploads the subsidy voucher to the block chain network if the subsidy voucher meets the examination and approval conditions.

5. The patch chain based agricultural machinery operation subsidy method of claim 4, wherein the agricultural machinery owner identifies the uploaded operation subsidy voucher and the owner ID on the management platform by using a re-hashing method.

6. The patch chain-based agricultural machinery work subsidy method according to any one of claims 3, 4 and 5, wherein the management platform searches the hash codes in the database by searching codes of the re-hash table in the database after the approval of the nodes at any time before, during or after the approval of the nodes.

7. The patch method for agricultural machinery operation based on the block chain as claimed in claim 1, wherein the management platform further comprises a client, and the agricultural machinery owner and the official are respectively logged in the official platform through respective login accounts through respective clients; the management platform further comprises a server, and the server uploads the information to an official approval department.

8. The patch chain-based agricultural machinery work subsidy method according to claim 1, wherein an intelligent contract is loaded in the server, and an official subsidy calculation standard formula is loaded in the intelligent contract: and calculating the final operation data to be subsidized according to the agricultural machinery operation information in the subsidy voucher and an official subsidy calculation standard formula, and performing hash coding on the operation data and storing the operation data in a database.

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