Abstract:Based on the panel data of planting area and price of soybean from 2001 to 2014 in ten major production regions,the supply response of soybean in China was studied in this paper by using extended Nerlove model with the variables of alternative crops yield,agricultural policy and time trend. The result shows that: Firstly,the lag of area and unit price had significant positive influences on the supply of soybean,but the alternative crops yield had significantly negative influences on it. Secondly,the variables of temporary reserve policy failed to pass the test of significance,so it is hard to decide that this policy had impact on the soybean supply of China. Thirdly,soybean farmers were mainly affected by the previous several periods of soybean prices in decisionmaking. Fourthly,the soybean supply didn’t respond sensitively to the price. The soybean shortterm price elasticity was lower than the longterm price elasticity and there existed a certain hysteresis. Finally,policy suggestions were proposed to ensure the soybean supply in China.