To examine the role of rumination and hope in posttraumatic growth(PTG), and assess a mediated moderation model, this study used traumatic exposure questionnaire, hope scale, rumination inventory and PTG inventory to investigate 416 adolescents 2.5 year after Ya′ an earthquake. The results found that intrusive rumination have a positive and direct effect on PTG, and intrusive rumination also predict positively PTG via deliberate rumination. Also, the findings indicated that hope did not moderate the relationship between intrusive rumination and deliberated rumination, whereas the association between intrusive rumination and PTG was moderated by hope. Specifically, the positive role of intrusive rumination in PTG is stronger with the increasing level of hope.