Pig cycle refers to an economic phenomenon. The increase in pork prices stimulates farmers' enthusiasm, causing an increase in supply, which in turn causes a decrease in meat prices. The decline in meat prices has hit the enthusiasm of farmers, resulting in a shortage of supply, which in turn has led to an increase in meat prices. This is the so-called "pig cycle". Pig cycle refers to the periodic cycle of pork price changes, that is, "high prices hurt people and low prices hurt farmers".

Pig production is unstable. Pig production is not synchronized with industrialization and urbanization. On the one hand, China's land, labor and capital flow rapidly to industries and cities, and the development of pigs slows down; On the other hand, the income of residents has increased rapidly, the rural population has flooded into cities, and the demand for pork has risen sharply. In particular, due to the low comparative benefit, the disease is difficult to control and the market risk is great, the pig production fluctuates greatly.

The standardization of large-scale feeding is low. In the previous fluctuation of live pig prices, free-range farmers lacked accurate market information and forecasting ability, so they could only blindly expand production or stop production in panic with the rise and fall of live pig prices. In 20 1 1 year, the Ministry of Agriculture monitored 2000 pig-raising villages in China, and the proportion of pig farmers was 22.74%, which still accounted for a large proportion.