The correct treatment of lung cancer has a lot to do with the prognosis. The treatment method should be based on the clinical stage of lung cancer, which is mainly based on the size of primary focus, lymph node metastasis and whether there is distant metastasis, i.e. TNM staging method. Since lung cancer can easily metastasize to the skull and bones insidiously, before clinical staging, cranial magnetic resonance or cranial enhanced CT examination and isotope bone scan (bone ECT) should be routinely performed. As for the patient’s general condition, in addition to age and physical condition, it is also necessary to understand the function of some important organs, such as the determination of heart, lung, liver and kidney function, especially the lung function, which is very important for deciding the scope of surgery. If the materials are complete, appropriate and correct treatment for lung cancer can be formulated. If the lung cancer is small cell lung cancer, surgery is generally not the first choice for lung cancer treatment, and chemotherapy or chemotherapy + radiotherapy is recommended first. If small cell lung cancer is not yet found to have obvious metastasis, surgery is usually performed after 3-4 courses of chemotherapy, followed by 2-3 courses of chemotherapy after surgery, or local radiotherapy. If small cell lung cancer has extensive metastasis, chemotherapy is the main treatment, and local residual cancer foci are then treated with supplemental radiotherapy, and surgery is basically not considered; if it is non-small cell lung cancer, first of all, it depends on the clinical stage: stage 0, stage I, stage II and stage IIIa are preferred for surgery. The scope of surgery depends on the size of the lesion and the patient’s lung function. There are various methods such as lung segment or lung wedge resection, lobectomy, total pneumonectomy, and then lymphatic clearance. Including stage Ib with high-risk factors, all surgeries need to be followed by 4-6 courses of adjuvant chemotherapy, therefore, the staging must be strictly mastered for proper treatment. If there are residual lesions or positive cancer cells at the cut edge after surgery, radiotherapy will be added again. If the patient cannot tolerate surgery due to poor physical condition, or if the patient does not want to have surgery, radiotherapy or radiotherapy + chemotherapy can be used. For stage IIIb or IV patients without surgery, chemotherapy and radiotherapy should be the main treatment procedures. Some new treatment methods, such as γ-knife, X-ray knife, heat therapy, etc., can also be used according to the condition and economic conditions. In conclusion, the treatment of lung cancer is complicated, and the treatment methods should be adjusted at any time according to the changes of the disease, while comprehensive treatment is its fundamental.