The main purpose of the study was to examine the mediating effects of emotional regulation on the relationship between adolescents’ perceived parenting attitude and social competence. The subjects were 400(212 male, 188 female) students attending three high schools in M City. Statistical analysis of data were Pearson’s correlation coefficient, confirmatory factor analysis and structural equation modeling. SPSSWIN 26.0 and AMOS 20.0 were used for data analysis. The results were as follows: First, adolescents’ perceived parenting attitude was positively correlated to social competence and adolescents’ perceived parenting attitude was also positively correlated to emotional regulation competence. Second, adolescents’ emotional regulation competence had full mediating effects on the relationship between perceived parenting attitude and social competence. Third, adolescents’ perceived parenting attitude did not have direct effects on social competence but positive indirect effects on social competence. Fourth, as a result of analyzing the mediating effects of emotional regulation competence on the relationship between perceived parenting attitude and social competence, it was found that adolescents’ perceived parenting attitude had significant indirect effects on social competence.