This paper explores the theoretical hypothesis of ratcheting effect from the phenomenon that pork price is “easy to rise and difficult to fall” and divides the region to refine the research level.The dynamic process of pork price ratcheting effects is reflected through the rolling regression,and the structural mutation test is used to analyze the time point of the ratcheting effects.The result shows that shortterm fluctuations in substitutes,cost prices and macroeconomics are the main causes of pork price ratcheting effects.Ratcheting effect has the synchronization in the region and the breaks on the time,which has gradually strengthened recently.The government’s macrocontrol policies shouldn’t only choose the period in which pork prices are soaring,but they must be adjusted flexibly and appropriately according to the change of the price of pork.Therefore,it is necessary to make early warning and comprehensive control so as to improve the effectiveness of control policies.