Abstract:In order to investigate the relationship between family size and happiness of migrant workers, as well as the role of children's status in this relationship, the impact of family size on happiness of migrant workers in China from the perspective of the relationship between family size and happiness of migrant workers based on the micro-data of China General Social Survey (CGSS) in 2021 was analyzed. The results are as follows. There is a pairwise positive correlation between family size, children's status and happiness. The status of children plays a partial mediating role between family size and happiness, that is, family size has an impact on the happiness of migrant workers through the status of children. Therefore, in the practical work of improving the happiness of migrant workers, it could be considered expanding the size of migrant workers' families and supporting the increase in the number of children in migrant workers' families.