The natural survival time of advanced lung cancer without chemotherapy is 3-6 months, because advanced lung cancer often has obvious respiratory symptoms, such as coughing, coughing sputum, blood in sputum, etc., as well as symptoms of distant metastasis, such as bone metastasis, brain metastasis, liver metastasis, etc., especially brain metastasis and liver metastasis are easy to endanger life. Coughing, coughing yellow sputum and lung infection are also causes of rapid death, and hemoptysis is more likely to lead to hemorrhagic shock or asphyxia and rapid death, so the prognosis of lung cancer in late stage without chemotherapy is very poor. Therefore, the prognosis of lung cancer without chemotherapy is very poor. Survival period is 3-6 months, and there are many treatment methods for lung cancer.