This study examines the development of children's social skills during the crucial transition from kindergarten to grade school. It explores the long-term connection between parenting styles and children's social skills. This study conducted a three-year longitudinal survey involving 121 children and their parents. The results show that early authoritative parenting styles were significant positive associated with children's social skills in second grade, and early authoritarian parenting styles were significant negative associated with children's social skills in second grade. Child-parent relationship closeness and receptive language skills mediate the association between early parenting styles and second-grade children's social skills. We propose that improving the closeness of the child-parent relationship and enhancing children's receptive language skills could effectively enhance children's social skills. This provides theoretical support for intervention programmes aimed at improving children's social skills.