Results after high volume lung lavage treatment: The main effect of high volume lung lavage is to remove a large amount of dust and dust swallowing macrophages, which removes pathogenic factors, stops or delays the progression of the disease, improves symptoms, protects lung function, preserves work capacity and improves quality of life. The earlier pneumoconiosis is treated, the better the results. The main effects are: 1. Improvement of symptoms: after lung lavage, the patient can feel clear breathing, chest tightness and shortness of breath, and the symptoms improve or disappear, and the efficacy continues to be consolidated during the long-term follow-up. 2, physical fitness, physical strength, the number of colds and upper respiratory tract infections significantly reduced. 3, total dust removal: each side of the lung in an average of 3000-5000 mg, of which 70-200 mg of free silica. 4.Clearance of 107-109 dust swallowing macrophages. 5.Lung ventilation function, small airway resistance, diffusion function, etc. were significantly improved, and arterial partial pressure of oxygen was increased.