Abstract: Objective In order to clarify the mechanism of stress on recruits' social anxiety,the mediating role of anger repression in their relationship and the moderating role of childhood trauma were investigated. Methods From October to November 2021,a total of 418 recruits completed the recruit stress scale,the revised state-trait anger expression scale,the social anxiety scale and the childhood trauma scale using the questionnaire method,and the data were collected and analyzed. Results The total scores of stress,anger depression,social anxiety and childhood trauma of 418 recruits in Beijing were （49.68±17.28）,（15.32±4.34）,（4.76±3.79） and （31.85±5.62）points,respectively. There were statistically significant differences in the scores of childhood trauma among the recruits with different educational backgrounds（t=2.139,P<0.05）. There were statistically significant differences in the scores of stress and anger depression among recruits in different family locations（t=1.116,2.833,both P<0.05）. There was statistically significant difference in anger depression scores between only child and non-only child recruits（t=2.926,P<0.05）. There were statistically significant differences in the scores of stress,anger depression and childhood trauma among recruits with different parental relationships（F=5.369,3.079,6.126,all P<0.05）. The stress of recruits was correlated with anger depression,social anxiety and childhood trauma（r=0.291,0.450,0.481,all P<0.01）,anger depression was correlated with social anxiety and childhood trauma（r=0.322,0.275,both P<0.01）,and social anxiety was correlated with childhood trauma（r=0.202,P<0.01）. Anger suppression played a partial mediating role between recruits' stress and social anxiety（β=0.388,8.682,both P<0.01）. Conclusion Recruits' stress and anger depression are the main influencing factors of social anxiety,and recruits' stress can also affect social anxiety through anger depression. Recruit managers can guide recruits to express anger reasonably,so as to improve their social anxiety and promote their better adaptation to the life of the army.

Key words: Recruits' stress, Anger depression, Social anxiety, Childhood trauma