Since reform and openness, under the influence of factors such as rural-urban income gap and optimizing the economic structure, mass of rural labor force shifted to cities in China. No doubt, the mobility of rural labor increases the income of rural residents, promotes the use of agricultural mechanization and the change of production model, leads the return of technology and capital, and thereby, promotes the development of agriculture. But the more important is that this characteristic of selective transfer has greatly changed the structure of rural practitioners, which has brought a great deal of uncertainty to the transformation of traditional agriculture. However, how this kind of selective transfer will play in Chinese agricultural production. In addition, what is this mechanism?In this article, we established agricultural production model under the back of selective transfer of rural labor force on the basis of Jia and Luo agricultural production function. According to the human capital's different pay in the rural and urban sectors, we divide the process of rural force transfer into three stages. At the same time, we make a in-depth analysis about the mechanism of agricultural production under the affection of selective transfer of rural labor force. Analysis shows that selective transfer of labor can make a little negative effect in the agricultural production in this initial accumulation of rural human capital. However, as selective transfer continues to advance, labor force's selective characters role will further highlight its constraints on agricultural production, along with the increasing sensitivity of modern agricultural technology to human capital. Subsequently, we make a empirical test through the amended Jia Bansen and Luo model based on the data of time series data in Gansu province and the second time national agriculture census. The empirical results confirmed our previous judgment.Study results indicate that more than 20 years'transfer of surplus rural population played a pivotal role in cities'development; on the other hand, it has become an integral mean to increase peasants'income. To one's surprise, agricultural production has made a great progress in the back of selective transfer, rather than be dragged down. It show that the labor's policy is correct in the past 20 years. So far, the benefits on agricultural production brought by non-human capital partial technology such as fertilizer and pesticide, has run out. Human capital partial technology such as mechanism and water irrigation will become the main mean to promote agricultural development. Then we should improve the rural labors'quality and prevent unnecessary loss of high quality rural agricultural talent.In the end of this article, the author made a further prospect about modern agricultural development under the background of the selective transfer. At the same time, the author proposed new demands about how to accumulate the rural human capital. As far as the government itself, he should make efforts in the following areas:1, Improving agricultural manpower capital; 2,Promoting the development of rural vocational technical education and adult education; 3,Increasing the rate of transformation of agricultural technology. |