The principle of lung cancer surgery is to completely remove the primary focus and the lymph glands in the chest that may have metastasis, and to preserve normal lung tissue as much as possible, and total lung resection should be done with caution. Reconstruction or sleeve total pneumonectomy: if a lobe of lung can be preserved, we will try to preserve it, and the procedure can be decided according to the situation at that time; 2. If the tumor is located in the lobar bronchus and involves the opening of the lobar bronchus, sleeve lobectomy is feasible; if the tumor does not involve the opening of the lobar bronchus, wedge-shaped sleeve lobectomy is feasible; 4.Lobectomy: for some patients with isolated peripheral lung cancer confined to one lobe and without obvious lymph node enlargement, lobectomy is feasible. Local resection: it refers to wedge resection and segmental resection, that is, for patients with small primary cancer, old and frail, poor lung function or well differentiated cancer with low malignancy, local resection can be considered.