Abstract: This study aimed to examine the relationship between self-identity and college freshmen's self-control, and to explore the mediating role of core self-evaluation and pursuing success motivation, 536 college freshmen's were surveyed using the Self-identity Scale, the Chinese version of Core Self-evaluation Scale, the Chinese version of Pursuing Success Motivation, and the Chinese version of Self-control Scale. The results showed that:(1) self-identity was positively associated with college freshmen's self-control; (2) core self-evaluation mediated the relationship between self-identity and college freshmen's self-control; (3) pursuing success motivation mediated the relationship between self-identity and college freshmen's self-control; (4) core self-evaluation and pursuing success motivation played chain mediating role between self-identity and college freshman's self-control. This study suggests that self-identity indirectly influences college freshmen's self-control through core self-evaluation and pursuing success motivation. This result have important theoretical and practical significance for revealing the factors that affect the self-control of college freshmen's and improving the path of self-control of college freshmen's.