Abstract: The article summarized professor Han Ming-xiang's clinical experience in the treatment of cough variant asthma (CVA). Professor Han held that CVA is closely related to wind， phlegm， stasis and deficiency. In terms of the etiology and pathogenesis of CVA， he put forward "One root cause and three symptoms"， that is， deficiency of qi and yin as "one root cause"， and the disturbance of wind pathogens， the retention of phlegm and fluid retention and the accumulation of stasis are "three symptoms". The treatment principle is guided by expelling wind and dispersing lung， moistening pharynx and throat， resolving phlegm and dredging collaterals， activating blood circulation and removing blood stasis as the main line， invigorating spleen and qi and nourishing yin and increasing fluid as the basis， in order to achieve the purpose of strengthening healthy qi， eliminating pathogenic factors and treating both the root cause and symptoms.