Abstract: Migrant children as a special group, living and studying in the city, due to the uncertainty relationship of peer relationship and teacher-student relationship, the family parent-child attachment relationship occupies an important position. Through the survey on students of two secondary schools in Kunming (junior high), this paper finds that there are significant differences between migrant children and urban children in the degree of parent-child attachment, and the inter-generational education, lack of educational integration, individual differences causes the difference. On this basis, this paper puts forward that we should explore feasible countermeasures and suggestion coming from family, school, and social support, so as to make migrant children better adapt to the urban environment and integrate into society.