Heilongjiang is a large agriculture province. Problems of agriculture, rural areas and farmers are urgent to be solved. The development of agriculture needs the support of agricultural credits, because finance is the center of agriculture economy. However, the low comparative advantage in agriculture and pursuit of the capital interests which aggravate the conflicts of supply and demand of agricultural funds. Lacking of fund is the main factor that constrains the development of agricultural economy. In order to analyze the economic effect of agricultural credits on agricultural economy, an error correction model was set up to research the relationship between them wluch based on the least square methods. Through the study of the contribution from agricultural credits to total value of agricultural out-put, the empirical evidence for developing the rural financial vigorously was provided, in order to promote the agricultura leconomic development.