Abstract: Objective To investigate the mental health status and the effect of mental health intervention among medical staffin emergency deparmtent for providing a basis for psychological in tervention.Methods Totally 209 medical staffin em ergency deparmtent of 6 general hospitals in Shenyang were examined with symptoms checklist(SCL-90).The results were compared with that of national norm.The examinees then were divided into intervention group(108 persons)and control group(101 persons)randomly,and were followed-up for one year.Adouble blind method was used in the assessment and intervention.Results Compared with national norm,the socres of somatization,compulsive interpersonal relationship,anxiety,hostile,paranoid and symptom of the nurses were obviously higher among the staff(P<0.05).Those of female staff were higher than that of the male,and those of the nurses were obviously higher than those of the doctors.With the mental intervention,the scores of intervention group decreased gradually.By the end of follow-up,the score of the interventiion group was 130.69±39.09,and that of con tro l group was 134.96±39.31,higher than that of national norm.The difference in the score of SCL-90 between the groups was different significantly(P<0.05).Conclusion The work and enviroment of emergency deparmtentmay cause psychological problems among medical staff.Mental health intervention may improve the mental health of the medical staff.