Objective:To learn about related knowledge of cough variant asthma,for lessening clinical misdiagnosis.Methods:Looking up literatures and summarizing points.Results and Conclusion:The cough variant asthma was a kind of special asthma presenting chronic cough.Patients with cough variant asthma onsets at any age.Much constituent ratio of chronic cough was cough variant asthma,which was usually misdiagnosed.With the development of immunogeneties and molecular biology,study of cough variant asthma gets thorough.This article reviews recent study on cough variant asthma.