Abstract: Objective To investigate the work related fatigue among prison police and mental medical staffs; to compare the social support between two groups; to develop specific intervention strategies in the future. Methods The Chinese Maslach Burnout Inventory（CMBI） and the Social Support Rating Scale （SSRS） were applied to 100 prison police and 100 mental medical staffs respectively. Their status of work related fatigue and relevant social support were analyzed accordingly. Results 1） The level of fatigue among prison police was higher than mental medical staffs（P<0.05）; 2） The factor scores of “emotional burnout” and “depersonalization” among prison police were higher than that among mental medical staffs（P<0.05）. There was no significant difference between the two groups on the “decreased sense of achievement”（P>0.05）; 3） The level of social support in the prison police was higher than that in the mental medical staffs（P<0.05）. Conclusion Both prison police and mental medical staffs were vulnerable to suffering from fatigue. However, the details and relevant social support between these two groups were different. Active intervention should be taken for different occupation.

Key words: forensic psychiatry, police, doctor, work related fatigue