Under the background of climatic change,regional division of main crop yield stability type was established based on the data of yield during 1949-2012 in Heilongjiang Province. Based on the data of future climate scenarios RCP 4.5 and crop yield during 2017-2060 of Crop Growth Simulation Model,regional division of main crop yield stability in future climate scenarios was set up using WOFOST Crop Model. The main conclusions were as follows:The coefficient of variation of rice yield was 0.44-0.78 from 1980 to 2012 and corn was 0.56-0.77 and soybean was 0.26-0.58. On the background of future climate scenarios,the high and stable yield of crop will be scattered in the south and east,the high and unstable yield will be mainly in the south and west,the low and stable yield will be in the north and east,and the low and unstable yield will be in the north and the middle part.