【Objectives】 To compare the distribution of three clinical subtypes of attention deficit hyperactivity disorder(ADHD) between Han and Uygur and to evaluate the application of Conners scale in three clinical subtypes of ADHD. 【Methods】 The data of ADHD Children from 2008 to 2010 of the section of children's health care in Urumqi First People Hospital were analyzed and the distribution of three clinical subtypes of ADHD,PSQ was employed to assess children's behavior in three clinical subtypes of ADHD and control,the total scores and factor scores were compared among the four groups. 【Results】 1)There were 1 164 ADHD children including 1 114 Han and 50 Uygur.2)The distribution of three clinical subtypes of ADHD was different between Han and Uygur,the most subtype was ADHD-HI at preschool,the one ADHD-C at primary school among Han and Uygur and the most subtype was ADHD-I at high school in Han.The factor scores (except anxiety and psychosomatic problem in Uygur and psychosomatic problem in Han) were found to be significantly higher in the three clinical subtypes compared to controls.However,no reliable difference was found in the factor scores between the ADHD-I and controls in Uygur. 【Conclusions】 The distribution of three clinical subtypes of ADHD between Han and Uygur and Conners scale may help to differentiate clinical case of ADHD from normal controls in aspects of conduct disorder,learning problem,impulsive-hyperactive behavior,as well as in terms of hyperactive index.On the other hand,the scale has limited value in differentiating clinical subtypes of ADHD.