Based on VAR model,this paper empirically studies the dynamic relationship between agricultural R&D investment and agricultural growth by using the data from 1989 to 2008.The result shows that there exists long-term balanced relationship between them.Agricultural R&D investment is not only the granger cause of agricultural growth,but also the significant positive element affecting the agricultural growth.However,the results of impulse response function show that the impact of agricultural R&D investment on agricultural growth is gradually weakened with the extension of lag because of the imbalance of type structure of R&D activities.Therefore,this paper points out that China should increase agricultural R&D investment and focus on the development of basic research and applied research.