关 键 词 ：生态环境；环境污染；人口流动；产业集聚学科分类：经济学--环境经济学
After the 19th National Congress of the Communist Party of China, China has entered a new stage of development, and people's attention has been paid to ecological and environmental issues. Urban environmental pollution not only affects the work and life of residents, but also damages their health and leads to population outflow. With the construction of ecological civilization, many cities have begun to attach importance to environmental governance and environmental optimization, thereby improving environmental quality and attracting population inflows. Therefore, this paper will focus on whether the quality of the ecological environment affects the flow of urban population in my country, and promote the orderly flow of population by preventing and controlling environmental pollution problems and improving the level of environmental optimization. This paper uses the panel data of 271 prefecture-level cities and above from 2006 to 2016, and divides the ecological environment quality into environmental pollution and environmental optimization to verify the impact on my country's urban population flow and its transmission mechanism. A sub-sample study was carried out on administrative-level cities, and three methods were used to test the robustness of data, including shrinking the tail of the data, adding environmental regulation control variables, and using differential GMM instead. At the same time, a dynamic panel model was constructed to solve the endogeneity problem. The study found that environmental pollution has a negative effect on population flow and promotes population outflow; environmental optimization has a positive effect on population flow and promotes population inflow. The impact of ecological environment on my country's urban population flow varies between regions. In the central and western regions, the impact of environmental pollution and environmental optimization on population flow is more obvious than in the eastern region; the impact of ecological environment on my country's urban population flow varies in different regions. There are differences between administrative-level cities. In general prefecture-level cities, the impact of environmental pollution and environmental optimization on population flow is more obvious than in high-level cities. Finally, this paper obtains policy suggestions for optimizing the ecological environment and promoting the orderly flow of population: innovate the reform of the household registration system, speed up the optimization and upgrading of the industrial structure, reduce the random discharge of pollutants,.