Population is one of the most critical factors affecting the distribution of educational resources. Based on the relevant data of Beijing Statistical Yearbook and Beijing Education Statistics，this report analyzes the relationship between the changing trend of school-age population and the supply of preschool education resources in the capital. The data shows that since 2010-2020，the number of kindergartens，full-time teachers and the number of children in kindergartens in Beijing are on the rise，which effectively increases the supply of educational resources. The unbalanced spatial distribution of preschool education resources has been improved，but the unbalanced distribution of inclusive resources in some regions still exists. Problems such as the difficulty of entering the kindergartens for non-Beijing school-age children and undocumented kindergartens have been effectively solved. In the future，it is still necessary to scientifically detect the size of the school-age population，continue to optimize the layout of educational resources and maintain the sustainable development of inclusive kindergartens.