Abstract: To further understand the development level of medical students' identity and their education service needs during their growth, and promote medical education quality, this study used the Self-identity Status Scale and the Educational Service Needs Questionnaire to investigate 1 188 undergraduates in Capital Medical University, and effectively recovered 1 017 questionnaires. The results showed that there were no significant differences in the scores of three dimensions of medical students' self-identity and the distribution of self-identity status among different grades (P＞0.05). In all grades, the average score of "past crisis" was the lowest, and the proportion of "identity diffusion - positive delayed intermediate status (D-M status)" was the highest. It showed 52.51% medical students expressed their demands for schools to carry out elective courses on the theme of self-exploration. The most important factor influencing medical students' in-depth understanding of themselves was the "parenting style of the original family", which accounted for 84.56%, followed by "influence of friends", which accounted for 75.12%. The top three ways medical students hope to improve their self-cognition are: "interaction and communication among friends" 69.32%, "reading books and literature"60.08%, and "participating in social practice" 50.93%. The main problem in medical students' self-identity development is the contradiction between the need for positive self-growth and the limitation of self-exploration. Educators should strengthen the inspiration of medical students' self-consciousness, pay attention to the combination of "theory" and "practice", improve education service mode and optimize the elements of ideological and political education.

Key words: self-identity, scales, medical students, educational service needs