The intergenerational mobility of peasant workers’ income level has aroused wide concern of the whole society and academic circles. The theme of this thesis is the analysis of factors affecting the income level of peasant workers’ subjective evaluation of the intergenerational mobility，and it puts forward the hypothesis that national institutional factors，social structural factors，family ascriptive factors and individual self induced factors will affect the income level of peasant workers’ subjective evaluation of the intergenerational mobility. The results of Logistic regression analysis show that，the influence of national institutional factors and social structural factors to the income level of peasant workers’ subjective evaluation of the intergenerational mobility are not significant，while the influence of family ascriptive factors and individual self induced factors are basically significant. Finally the paper points out that the operation mechanism must be adapt to national institutional factors，social structural factors，family ascriptive factors and individual self induced factors to promote peasant workers’ income level of intergenerational mobility.