Objective To assess the behavior of children with tic disorder (TD),and to analyze the behavioral characteristics among children with TD at different clinic conditions.Methods Sixty-three children with TD were evaluated with Child behavior checklist (CBCL).ANOVA and t-test were used to analyze the difference in the total and individual scores of CBCL in the children classified according to the different clinical types,the severity of TD,and comorbid attention-deficit hyperactivity disorder(ADHD).Results There were no significant differences among the total and individual scores of CBCL in the patients of the different clinic types( P ＜ 0.05 ) ;the scores of body complain in the patients in moderate to severe conditions (4.15 ± 2.34) were higher than that of those in mild condition ( 2.68 ± 2.22 ) ( t =- 2.540,P =0.014) ; the scores of attention problem (9.94 ± 3.57 ),disciplinary offence ( 3.94 ± 3.06 ),aggressive behavior ( 15.39 ± 5.12 ),exportoriented behavior problems ( 13.98 ± 7.34)and behavior problem (47.89 ± 17.51 )in TD comorbid ADHD were higher than in simple TD group ( 7.31 ± 3.34,2.44 ± 2.22,7.24 ± 4.93,9.78 ± 6.55,37.07 ± 17.98 ) ( t =- 2.774,- 2.166,- 1.930,- 1.956,- 2.174,P =0.007,0.034,0.048,0.04 1,0.034 ).Conclusion Children with TD at different clinical conditions have varied behavioral problems and behavioral characteristics,while comorbid ADHD is the most significant factor to affect TD patient's behaviors.