The movement of the rural labor force is one of the common phenomenon of China's industrialization and urbanization. China's massive labor moving has a big impact on the economic and social development.Recent the research about import mobile labor force of the impact of the gap between rural and urban areas, the attention of academ is not small.Sharply into the rural labor force become one of the most important features of the Chinese economy.Most of the recent studies of the influence of rural labor flow towards into the size of the workforce,the reasons or social welfare and the relationship between industrial structure and urban and rural, or effect of the income gap is not involved.Now this article will study on the social economy of the rural labor force mobile view ,at the same time the characteristic of the movement of the rural labor force the influence caused by the income gap between rural and urban areas is analyzed. First of all, the research of Chinese scholars both at home and abroad relevant theoretical and empirical analysis results as the foundation, the basis of research and provide a theoretical basis. And the status quo and characteristics of rural labor force, the status quo of the household income gap between rural and urban areas, China's household registration system, the labor market, rural, education, social security and the existence of variables such as industrial structure, China's rural labor force into the income gap between rural and urban areas, analyze the reason for the birth. The present situation and cause analysis is considered to be research based on the empirical analysis. The results of the oretical and empirical analysis can be summarized as follows. China's rural labor flow actually expand the family's income gap between urban and rural areas. thereason is that China's special household registration system, the labor market segmentation, the lack of human capital, low development of rural economy, the development of the industrial structure, etc.But the rural labor flow through the education in rural areas and the development of non-agricultural sector (especially the service industry) see family is able to eliminate the income gap between urban and rural areas.But at present, China's household registration system to improve the unreasonable, policy authorities need hard working.