Based on X12 seasonal adjustment model and HP Filter,this paper analyzes the characters of seasonality,periodicity and tendency of swine price volatility.On this basis,this paper analyzes the impact of price volatility on interests’ allocation of the swine industry chain by using the data of price volatility and cost produced in every part of purchasing the swine in Zhongmou,Henan province and marketing the swine in Yuyao,Zhejiang province.The result shows that yield of swine propagated and raised by themselves is higher than that of professional fattened.The price of the swine is the vibration source of the price volatility of the whole industry chain,which is transferred to the price of the pork in an unsymmetrical way.The yields of swine raising vary sharply,which is the weakest and highest risk part of the industry chain.The contradiction of supply and demand depends on supply.Therefore,it is urgent to promote the integration of the swine industry chain,develop the diversification of the swine insurance,improve the level of farmers professional knowledge,which can resolve the problem of the periodic price volatility of the swine.