Abstract: Objective To explore the mediating effect of social self-efficacy and social satisfaction on the mobile social network use and social anxiety,and to explore the path of using mobile social network to improve the social ability of adolescents.Methods A total of 2 056 students from 11 secondary schools and universities were surveyed by the mobile social network overuse questionnaire,the impact factor questionnaire of mobile social network use preference and the interaction anxiety scale,the statistical analysis was carried out by SPSS 18.0 and bias correction non-parametric percentile Bootstrap confidence interval method.Results There was a significant positive correlation between the use of mobile social network and social self efficacy and social anxiety(r=0.354,0.315,P<0.01),and there was a significant positive correlation between social self-efficacy and social satisfaction(r=0.224,P<0.01).The use of mobile social network had a positive predictive effect on social anxiety(β=0.187,P<0.01),social self-efficacy and social satisfaction had a negative predictive effect on interaction anxiety(β=-0.370,-0.090,P<0.01).The relationship between the use of mobile social network and social anxiety can be mediated through two indirect paths,which were social self efficacy,social self efficacy and social satisfaction (direct effect=0.152,95%CI=0.119-0.185).Conclusion The use of mobile social networks can reduce the social anxiety,improve social communication ability through social self-efficacy and social satisfaction.