Educational resources should be allocated for students. The changes of school age population have directly impact on the allocation of educational resources. At the same time，the projection of school age population is also an unavoidable part of the scientific education plan. l the factors such as the birth cycle，the universal two-child policy and coordinated development of the Beijing，Tianjin，and Hebei region also need to be considered. This article uses the education statistics published by the Beijing Municipal Education Commission，the Beijing Statistical Yearbook，the 2130 and 2010 Beijing Population Census data，the 2015 Beijing 1% population sample survey data，which project the basic education stage population from 2020 to 2035. In general，in the next 15 years，the population from pre-school to high school education stage will reach peaks in 2021，2027，2030，2033. Comparing the predicted values of the low and high programs，the universal two-child policy has a greater impact on pre-primary and primary education.