【Objective】 To explore the correlation between family environment and behavior characteristics of boys with attention deficit hyperactivity disorder(ADHD)combined with tic disorder(TD)(CAT). 【Method】 50 boys in each group of CAT,ADHD,TD and normal group were investigated using Family Environment Scales-Chinese Version(FES-CV)and the Child Behavior Checklist(CBCL). 【Results】 In FES-CV,the scores of emotional expression,intellectual-cultural orientation,entertainment and organization of CAT group were significantly lower but independence and contradictoriness were higher than those of normal control group(P＜0.01),contrasted with TD group,the score of intellectual-cultural orientation of CAT group were decreased(P＜0.05).In CBCL,all of scores in CAT group were remarkably higher than the N group(P＜0.01),the scores of obsession in the CAT group were increased compared with ADHD group(P＜0.05),most of scores in the CAT group were obviously higher except divisiveness and abruption when compared with the TD group(P<0.01).Correlation analysis showed that there was a negative correlation between cohesion in FES-CV and obsession,social recession,hyperactivity,aggression and undiscipline in CBCL,and there were similiar trends between emotional expression and depression hyperactivity aggression. 【Conclusion】 Family function defect in boys with CAT have a certain impact on behavior problems of those children.