Abstract:The recent volatility in the price of pork in China has aroused wide attention from all sectors of society.In this paper,we analyze the price expectations and the cost of adjustment cycle of the pig supply by Nerlove supply model,and conduct an empirical analysis on influencing factors of the supply of pork in the overall with autoregressive distributed lag Error Correction (ARDLECM) model.The results show that the longterm supply elasticity of the price of pork is less than the shortterm.And in many affecting factors,the feed prices have the greatest impact on pork supply in the short term.This paper argues that,because of the serious lag of prices expectation’s influence on the supply of pork,China should adopt countercyclical payments policy on macrocontrol of pig production.