Abstract: Parent-child relationship is the first social relationship in the process of children's growth. It is the most durable, stable and closest relationship in the process of children's growth and development. Parent-child relationship plays an extremely important role in the process of children's psychological development. The research is based on Brenfenbrunner’s ecosystem theory, focusing on the most direct factors affecting children’s development, focusing on the impact of parents’ occupational status, family rearing styles, and parent-child interactions on children’s mental health development. As an independent variable to examine its impact on children’s social development, effective parent-child interaction can have a positive impact on the improvement of children’s abilities in all aspects. The results show that the quality of parent-child relationship will affect children’s future socialization level and peers relationship.

Key words: Positive psychology, Parent-child relationship, Children's psychological development, Mental health, Social development