CVA is specific type of asthma， which main or unique clinical manifestation is chroic cough from the perspective of traditional Chinese medicine it called wind-induced cough， asthma-induced cough. It usually caused by retention of wind and Qi. The lesion viscera are located in lung and liver. For treating CVA， Chinese medicine usually take the function of lung， liver into consideration：ventilating lung Qi for lowering adverse Qi， clearing lung and eliminating phlegm， adjust the function of liver and lung， nurishing yin for moistening lung and nurishing the Qi of lung and spleen and kidney.