Abstract:Based on reasons influencing the price fluctuation of China’s ducklings,this paper studies the price volatility by using X12 seasonally adjustment and Hodrick Prescott filter model.The result shows that :duckling price fluctuation is cyclical,the average cycle length is 33 months.Each cycle is a non-symmetrical.The continuing rising time in each cycle is less than the falling time.Therefore,this paper proposes some suggestions:establishing perfect qualification system and standards permit system of duckling production;reasonably controlling ducklings supply scale;maintaining fluency of international and domestic duck market information and strengthening the prevention and control on epidemic disease and so on.