Abstract: In this paper, we proposed that the development of agricultural mechanization is the objective development process,the agricultural mechanization is not only a process of technology development, but also invovled the development process of economic,society and culture. We must make industrial modernization,technological modernization and the human modernization in the coordinate development. The article also analyzed the systematic and selective of modernization of agriculture,and raised that we should combine the conditions of agronomy, agricultural machinery, nature, resources and environment to develop modern agriculture.