Abstract: OBJECTIVE To classify the constitutional types and provide the prevention and treatment programs in Chinese medicine for children with asthma. METHODS According to the physical features， daily performance and susceptibility through clinical investigation of 120 cases children with asthma， their constitution types were classified. RESULTS The larger percentage of asthma children present the lung deficiency tending to qi insufficiency (account for13.33%)， yin insufficiency (24.17%)， the spleen deficiency tending to qi insufficiency (20.00%)， the lung-spleen deficiency tending to qi insufficiency (24.17%)， and 22 accompany with phlegm-damp and 17 accompany with phlegm-heat. CONCLUSION The constitutions of asthma in children have individual differences obviously， but they still can be classified by clinic investigation. Most of them are the insufficiency constitution types.