Lung cancer is treated by surgical resection, chemotherapy, radiotherapy, molecular targeted therapy, immunotherapy and other methods. Lung cancer is divided into small cell lung cancer and non-small cell lung cancer, with non-small cell lung cancer accounting for the majority. Treatment methods include: early stage non-small cell lung cancer or lung cancer with only regional lymph node metastasis is preferred for surgical resection, and patients with stage IIb, stage III and stage IV are traditionally required to undergo chemotherapy and post-operative adjuvant chemotherapy. However, with the advancement of modern medicine, molecular targeted therapy has been widely used in recent years for non-small cell lung cancer and has good efficacy. Immunotherapy has also been the subject of research by scientists, and trials have found that effective immunotherapy can significantly prolong the survival of patients. At this stage, the treatment of advanced non-small cell lung cancer is generally based on a three-step strategy: 1. targeted therapy based on driver genes; 2. immunotherapy is feasible without driver genes if PD-L1 expression is high; if there are no such indications, a combination of chemotherapy, radiotherapy and Chinese medicine can be considered. Small cell lung cancer is usually found to be advanced when diagnosed, and chemotherapy, immunotherapy plus local radiotherapy should be preferred.