The paper has investigated the sex psychological health of 1400 students from the six different normal universities. The results have indicated that there is a negative relationship between sex psychological health and personal traits. The level of psychological health will decrease due to the rise of level of psychological quality, which means that the higher the psychological personality score is, the lower the psychological health level is. Therefore, psychological quality can predict the situation of sex psychological health. In this case, psychological quality not only provides practical basis in terms of understanding students’personal trait and strengthening personality, but also provides theoretical basis for the normal universities to improve the psychological quality of student.