Objective　To explore the mental health status and characteristics of professional degree postgraduates. Methods　326 professional degree postgraduates from 3 universities were selected as subjects by cluster sampling. Symptom checklist 90 (SCL-90) was applied to assess psychological health of the postgraduates in order. Results　1) The positive rate of psychological symptom screening was 11.11%. The detection rate of psychological problems from high to low was: obsessive-compulsion

interpersonal sensitivity

depression

hostility

somatization

paranoid ideation

anxiety

phobic anxiety and psychoticism. 2) Excluding the factors of phobic anxiety

there was significant age difference in each factor score and total score of SCL-90 (P<0.05). The somatization

interpersonal sensitivity

anxiety

hostility

paranoid ideation

psychoticism factor scores and total score of the ≥30 years group was significantly higher than those of ≤24 years and the 25-29 years group (P<0.05)

the depression factor scores of ≥30 years was significantly higher than the ≤24 years group (P<0.01). 3) The scores of somatizations (P=0.038) and obsessive-compulsive factors (P=0.043) of doctoral students were significantly higher than those of master students. 4) In different grades

there were significant differences in the scores of obsessive-compulsives

depression

anxiety

hostility

paranoid ideation factor scores and SCL-90 total score (P<0.05). The factor scores and total score of the Grade Three were significantly higher than those of the first grade (P<0.05)

and the scores of hostilities

paranoid ideation factors and total score were significantly higher than those of the second grade (P<0.05). 5) Excluding phobic anxiety

the factor scores and total score of SCL-90 in the peace and tranquility group were significantly lower than those of quarrel group (P<0.05). 6) Except for somatization and paranoia ideation

the factor scores and total score of SCL-90 of caring group were significantly lower than those non-caring group (P<0.05). Conclusion　The psychological health of graduate students of professional degree varies with age

educational level and grade

and is influenced by collective atmosphere and mentor attitude. The differences in the characteristics of the crowd should be taken into full consideration in the mental health education of colleges and universities

and the educational model should be explored

the educational goals

contents and forms should be refined to improve the mental health level of the population.