Pork price is essential in Chinese household consumption. Pork price prediction can advise the government to control the macroeconomy. Because of the explicitly periodic feature for pork price, previous researchers used fancy functions to fit the price cycle and predict it. However, only few researchers have tried to solve the pork price cycle based on the actual production of hogs. In this paper, a model is constructed using the most straightforward optimization and age structure of hogs to simulate the production process in pig farms and the pork price trend. The results match the claim that the price has a five-year cycle, and the model does well in empirical testing. Finally, some advice on controlling inflation is given based on the model prediction.