Abstract： This article is to introduce Professor HONG Minli′s clinical experience in treating refractory chronic cough from the perspective of kidney. Refractory chronic cough in traditional Chinese medicine belongs to the category of long-term and stubborn cough. Professor HONG believes that the etiology and pathogenesis of this disease lie in deficient kidney and weak defensive qi，insecurity of defensive qi，deficiency of kidney yin，deficient fire burning the metal， deficient yang and overflowed water，phlegm-fluid retention attacking the lung，resulting in the lung failing to disperse and descend，adverse rising of lung qi，and long-term and stubborn cough. Although its pathological location is in the lung，the root cause of refractory chronic cough is in the kidney. Therefore，the treatment should focus on the regulation and tonification of the lung and kidney. The physiological functions of the lung should be restored to suppress cough through warming the kidney and protecting the defensive qi， nourishing the kidney and moistening the lung， and warming the kidney and supporting yang.