Lung cancer in advanced stage cannot be cured by itself without chemotherapy, and if not treated in time, it will jeopardize patients’ survival, even less than 3 months. When lung cancer develops into advanced stage, it will be transferred to distant tissues and organs through blood, such as bone metastasis, brain metastasis, liver metastasis, adrenal gland metastasis and so on, and it will also be complicated with complications such as lung atelectasis, lung inflammation, bronchopleural fistula and corresponding complications of metastatic organs. Once the disease develops into advanced stage, it cannot be cured by itself, and it is necessary to combine with the physical condition in time, control the spread of cancer cells and metastasis through chemotherapy, targeted therapy, radiotherapy and other comprehensive treatments, so as to slow down the survival time of patients. If not treated in time, it will jeopardize the patient’s life and health at any time. Once lung cancer is diagnosed to develop into advanced stage, it is necessary to continue treatment, and the earlier the treatment, the sooner the disease can be controlled.