The paper used the dynamic monitoring data of the floating population of the National Health and Family Planning Commission in 2014. Basing on the occupational classification，the paper analyzed the social class structure station of this group，mainly to make clear that as the population control object，who are they？The study finds that the proportion of middle class in Beijing migrant resident population is too small. The quality of business service personnel class is too low. Social class status is relatively low. Regional social class structure has shown an imbalance. Therefore，by analyzing the current population control situation，the paper put forward that we should improve the quality of social class and expand the scale of the middle class，set up the upward flow mechanism and promote the social class status，allocate regional resources rationally and optimize the social class structure.