Abstract: Cough Variant Asthma (CVA) is one of the common causes of chronic cough. Recurrent irritating tussiculation is CVA's main clinical manifestation. Modern medicine uses drugs which treat bronchial asthma to control the disease or to relieve symptoms. It is stated that pathogenic-wind-invading-lung is the main factor accounting for the forming of CVA in traditional Chinese medicine. Treating CVA with Chinese herbal medicine such as wind-expelling drugs has achieved certain effects. Based on comprehensive analysis of characteristics of wind-expelling drugs， it is reported that wind-expelling drugs can dispel wind pathogen， rise Spleen Qi introduce drugs into meridians， relieve cough and relieve spasm. The study can provide theoretical basis and feasible methods in clinical practice to treat CVA.