Abstract: Few studies focus on the effects of spillover of agricultural technology using the approach of spatial econometrics. Based on measurement of the matrix of similarity of agricultural products and the stock of technology spillover, we analyze the effects upon which agricultural technology spillover have to productivity. We reach conclusions as follows: there is spatial correlation for agricultural production in china, and the spatial correlation become more significant when one province is more similar to the other province in agricultural technology. Agricultural technology spillover between provinces have positive effects on the production of agriculture, and the estimated coefficient lies in0.25, bigger than the coefficient of the stock of research of own(0.12). Using multi-dimensional scaling, we get three clusters of provinces in which the technology is similar. The effects of technology spillover within the clusters are greater than that between them.