Abstract: Objective To study the effect of psychological intervention on psychological health level of the train staff and to provide reference for the prevention of railway traffic accident. Methods Psychological health status of 323 train staff in intervention group and 403 in control group from Liuzhou locomotive terminal was tested with Symptom Checklist-90(SCL-90).Individual therapy,group therapy,health education,and psychological hotline were applied to the staff in the intervention group based on their total scores of SCL-90. Results There were 108 staff with scores of SCL90 >160 and the average was 153.92±48.89 for the staff in the intervention group.There were 152 staff with the scores of >160 and the average score of SCL-90 was 160.09±55.45 for the staff in the control group.The detection rates of psychological problems for the intervention and control group were 33.40% and 37.71% and all of the factor scores of SCL-90 of the staff were higher than those of national norm(P<0.01).After the intervention,the 8 factor scores of SCL-90 for the staff in the intervention group showed a 8% decrease with an average score of 144.86±35.42 (P<0.05 for all)except somatic symptom(P<0.05 for all).Compared with those of the control group,nine symptom factor scores for the intervention group were lower(P<0.05).Compared with the survey data of the staff in Guangzhou Railway Group,all factor scores of SCL-90 for the staff were lower(P<0.05 for all)except the factors of obsession and paranoia. Conclusion The psychological health of the train staff is lower than that of the national norm.The psychological intervention could improve overall psychological health among the train staff.