Objective To explore the relationship between occupational stress and job performance and the mediating role of psychological capital. Methods Proportion allocation random sampling was used to investigate 400 psychiatrists from all the 1 571 psychiatrists in all the 18 psychiatric mental health centers in Liaoning province. SPSS17. 0 statistical software was applied to perform statistical analyses and test study hypothesis. Results The total score of job performance scale was 78. 09 ± 10. 85. Job performanc...