Objective: To explore the moderating effect of parenting style on parental involvement in education and aggressive behavior of nursery child, so as to provide a reference basis for promoting the healthy development of nursery child behavior. Methods: From March 2023 to February 2024, through a stratified cluster random sampling method, 1 509 parents from 12 kindergartens in Heilongjiang, Shanxi, Shandong, Jiangsu and Guangdong provinces were investigated by using Parental Involvement Questionnaire, Parental Reported Aggression Behavior Subscale of Child Behavior Checklist, Parenting Styles, and Dimensions Questionnaire. Mann-Whitney test and Kruskal-Wallis H test were used for group comparison, and Spearman correlation analysis was used to explore the relationship between parental involvement, aggressive behavior in nursery child and parenting style. Stratified linear regression analysis was used to investigate the moderating effect of parenting style on parental involvement and aggressive behavior in young children. Results: There was a significant positive correlation of aggressive behavior in nursery child with authoritarian parenting styles and indulgent parenting styles ( r=0.53, 0.52, P <0.01). Aggression behavior in nursery child was negatively associated with authoritative parenting styles, home communication, in school participation, and in home participation ( r = -0.15 , -0.12, -0.09, -0.10, P <0.01). The regulatory effect results showed that authoritative and authoritarian parenting style had a statistically significant moderating effect on parental involvement and aggressive behavior in nursery child ( β=0.12, -0.11, P < 0.01), while permissive parenting styles had no statistically significant moderating effect on parental involvement and aggressive behavior ( β= -0.01, P >0.05). Conclusions Parents involvement in education is closely related to nursery child s aggressive behavior. The authoritative and authoritarian parenting styles moderate the relationship between parental involvement and aggressive behavior in nursery child, while the permissive parenting styles does not.