In this paper, based on feedback effects between the floating population, economic growth and the fog haze in Beijing, by constructing dynamic equation around the lagging items and the system GMM, to analyze the long-term equilibrium relationship and dynamic effect mechanism between the floating population, economic growth and haze .Based on the obtained data, the system GMM method is used for the empirical test. Therefore, this paper studies the correlation between the floating population, economic growth and haze in Beijing.