Aim: Analysis the mediating (main effect) and regulating (buffer effects) of social support onthe relationship between childhood psychological abuse experience and post-traumatic growth. Method:Three questionnaires were used: childhood social support, psychological abuse (childhood) and posttraumaticgrowth, A total of 630 college students from 5 colleges and universities in a certain provincewere tested, SPSS 19.0 was used for data entry and statistical analysis, and Mp1us7.0 was used to establishthe structural equation model. Result: (1) Psychological abuse was negatively correlated with socialsupport and post-traumatic growth (r=-0.306, p<0.01; r=-0.249, p<0.01), social support was positivelycorrelated with post-traumatic growth (r=0.21, p<0.01) . (2) Social support significantly moderated therelationship between psychological abuse experience and post-traumatic growth (c=0.034, p<0.01) .(3) Structural equation model (SEM) results show that childhood psychological abuse experience can havea total negative impact on post-traumatic growth -0.247. The negative effect on post-traumatic growthis indirect through the social branch -0.1660.902=-0.150, the effect of mediating social support on posttraumaticgrowth was -0.098. The mediating effect of social support accounted for 60.7% of the negativeeffects of childhood psychological abuse on post-traumatic growth. Conclusion: The results of this studyshow that the relationship between psychological abuse and post-traumatic growth is moderated by socialsupport (buffer model), and psychological abuse influences post-traumatic growth of college studentsthrough the mediating effect of social support (main effect model).