RIASSUNTO
Based on the agricultural data from 1990 to 2009 of Heilongjiang province, with Cobb-douglas production function, SPSS software using multiple regression equation for the establishment of agricultural investment main factors of influencing agricultural investment efficiency. Analysis showed that the biggest influence factors on agricultural investment efficiency are chemical fertilizer inputs, land sown area and labor. Meanwhile, analyzes the social benefit and ecological benefit of agricultural investment. At last, puts forward for improving agricultural investment benefit measures and suggestions¿Csuch as adjust the industrial structure, strengthen the government on rural infrastructure investment, strengthen the education and training of farmers