Interstitial fibrosis, in layman’s terms, is an inflammatory disease between the alveoli, which results in the destruction of the elasticity between the alveoli and the gradual formation of fibrotic changes. The cause of the disease is not very clear, the main symptoms are progressive dyspnea, that is, dyspnea is getting heavier and heavier, and cough, secondary infection can have cough sputum, shortness of breath, fatigue. Signs: Bursting sounds can be heard in the lungs in the middle and late stages. 2.Physical and chemical examination: chest X-ray especially lung CT can confirm the diagnosis. Treatment: 1. Glucocorticoids are mainly applied in the progressive or active stage of the disease. 2.Chinese medicine treatment: according to the patient’s physique for dialectical treatment, like benefiting qi and activating blood, nourishing yin and moistening the lungs, resolving phlegm and stopping cough, warming the kidneys and assisting yang and so on.