Objective    To provide the scientific evidence for formulating the general intervention measures for juvenile criminals by investigating the correlation between anxiety and depression of them and their coping styles.     Methods    Anxiety and depression of 909 juvenile criminals in Chongqing Juvenile Criminals Rehabilitation Centre were investigated with general state questionnaire

self-rating anxiety scale (SAS)

self-rating depression scale (SDS)

and trait coping style questionnaire (TCSQ).      Results    The prevalence of anxiety and depression in juvenile criminals was 40.4% and 51.2%

respectively. The juvenile criminals with both anxiety and depression accounted for 31.3%. Good family economic condition and high education level were the protective factors for depression

while maltreatment in childhood was the risk factor for depression. Good family economic condition was the protective factor for anxiety

while maltreatment in childhood and more than one child in a family were the risk factors for anxiety. The positive coping style was negatively correlated with the severity of anxiety and depression (r=-0.172

r=-0.208

P0.01)

while the negative coping style was positively correlated with the severity of anxiety and depression (r=0.419

r=0.390

P0.01).     Conclusion    The depression and anxiety of juvenile criminals are significantly correlated with their coping style. Positive coping style can reduce the incidence of depression and anxiety.