Objective:To study the validity of MMPI in police recruitment.Methods:9096 police applicants had been tested with MMPI from 1989 to 2004.Results:1694 male applicants were not accepted, they got higher MMPI(Chinese version) T-scores on scale Hs(61.9?10.0/45.4?6.6,t=8.76), Pa (61.6?12.7/46.6?8.1,t=5.85), Pt (58.7?10.1/43.3?7.6,t=6.45), Sc (65.4?7.8/44.6?6.6,t=11.46), and Ma, so did the female ones on scale Pt (60.9?3.7/42.2?8.2 ,t=3.79), Sc (68.9?3.0/45.2?8.2,t=4.96), and Ma (63.5?4.1/50.1?9.2, t=2.48). After a 16-year follow up, the results showed that in the group enrolled, none had suffered mental illness. 43 out of 70 applicants who were not accepted during 1989 to 1990 were investigated. Two of them had been sent to psychiatric hospital for schizophrenia.Conclusion:Result of MMPI is valuable in police recruitment.