A child's ability to engage positively with others, express emotions positively, and control behavior is referred to as social and emotional competence. Thus, the aim of this study was to explain social-emotional competence based on positive mood Characteristics, self-efficacy in emotion regulation with mediating role of social support of female students. The method used in this research was structural equation modeling correlation, which was performed in Tehran during the academic year 2018-2019 in December and October. 420 female students from all female students with an average age of 17 years in public schools in Tehran in the academic year 2019-2020, were randomly selected by cluster sampling method. Bromes's temperament (2007), social support of Wax et al. (1986), self-efficacy of Caprara et al. (2008), and competence Emotional-social completed by students Zhu and Ei (2012) questionnaires were administered to students. Pearson correlation coefficient test and path analysis methods were used to analyze the data. Data were analyzed using SPSS-21 and AMOS18 software. Based on the presented model (The root-mean-square error (RMSEA) was 0.072, and the square root of the mean squared residual (SRMR) was 0.062, which was less than the criterion (0.08) and thus confirmed the fit of the model. Based on the results, Positive mood traits affect social-emotional competence both directly (P <0.05, β = 0.159) and indirectly through social support (P <0.05, β = 0.204). In order to promote social-emotional competence, social support should consider an effective variable and important intervention priority of educational systems.
