There was a great deal of empirical research on narcissism in Western psychological field. This research relied on the theoretical studying of predecessors, explored undergraduate students’ narcissism and its relationship with mental adaptation. The results showed: (1) There wasn’t significant difference in Narcissism by sexual distinction. But there was significant difference in mental adaptation. Men students were better than women students in mental adaptation. (2) Students from different specialized subjects had not significant difference in Narcissism. But there was significant difference in mental adaptation. (3) Compared with narcissism and 4 factors of mental adaptation, there was relationship between narcissism with mental self-control and self-confidence.