With the increasing incidence and detection rate of pulmonary sarcoidosis，pulmonary sarcoidosis has gradually attracted attention of all circles.Effective intervention in pulmonary sarcoidosis during CT follow-up，delaying its progression，controlling its growth，and eliminating nodules are the key issues of modern medicine.The present study discussed the treatment of pulmonary sarcoidosis based on the lung collateral theory from the connotation，structure，and physiological characteristics of lung collaterals.As explored，the deficiency and injury of lung collaterals is the pathological basis of pulmonary sarcoidosis; the imbalance of qi movement in lung collaterals is the pathological link; qi depression and phlegm stagnation and accumulation in lung collaterals are important pathological evolution; depression and blockage in lung collaterals is the basic pathogenesis.Finally，by virtue of the advantage of the collateral disease theory in traditional Chinese medicine(TCM)，this study proposed the method of dredging collaterals in the treatment of pulmonary sarcoidosis to provide a new diagnosis and treatment idea and theoretical understanding for the clinical treatment of pulmonary nodules.