The five-year survival rate after conservative treatment of advanced lung cancer at the age of 80 is often less than 5%, which can vary slightly. Lung cancer is a common malignant tumor of respiratory system, and the occurrence of the disease is related to smoking, age, heredity and other factors. Late stage is often accompanied by distant metastasis. 80-year-old patients may have poorer physical condition on one hand; on the other hand, their condition is more complicated, and most of them are treated with conservative therapies, such as radiotherapy, chemotherapy, targeted therapy, immunotherapy, etc. In addition, patients can also be treated with cloth, which can be used to treat lung cancer. In addition, ibuprofen, fentanyl and other painkillers can be applied to patients for symptomatic treatment. The purpose of treatment in this stage is to prolong the survival time and improve the quality of life of patients, and after treatment, advanced lung cancer patients can obtain a five-year survival rate of about 5%.