Females with childbearing age are the direct undertakers of reproductive behavior and childbirth within marriage and family is the mainstream cultural concept and the dominant reproductive behavior in China's history and reality. Maintaining a moderate fertility level and population size is the inevitable requirement for the high-quality development of the population to support the Chinese modernization. Based on the data of the sixth and seventh national censuses in Dongcheng District of Beijing, this paper uses birth cohort analysis, period analysis, population type comparative analysis and binary logistic model analysis to examine the characteristics, changes and interrelationships of women's marriage and childbearing behavior and family structure in mega cities. The study found that there are significant differences in the marital behavior and family structure characteristics of different types of female population, and the population type and marital status have a significant impact on the family structure of women. According to the research, maintaining an appropriate fertility level must focus on women's marriage and childbearing behavior and their family structure. It is necessary to accelerate the establishment of a targeted, differentiated, coordinated and systematic fertility support policy system according to the characteristics of their marriage and childbearing status, population type and family structure.
mega citiesmarriage and childbearing behaviormarriage and childbearing intentionfamily structure