The average survival of stage IVa lung adenocarcinoma in general is about 7 months, and the 5-year survival rate is less than 5%. The specific survival period is related to clinical stage, treatment method and other factors. Lung adenocarcinoma belongs to non-small cell lung cancer, which is a common type of lung cancer. According to relevant authoritative data, in general, the average survival period of stage IV lung adenocarcinoma is about 7 months. Secondly, “5-year survival rate” is commonly used in clinic to roughly assess the survival of tumor patients, and the 5-year survival rate of this stage is less than 5%. However, the specific survival time of stage IV lung adenocarcinoma is mainly related to clinical stage, treatment method, physical condition and other factors, so there are obvious individual differences, and no generalization can be made, and it needs to be determined according to the specific situation. All in all, the later the stage of lung adenocarcinoma is, the worse its prognosis is. Therefore, patients need to actively cooperate with doctors to carry out standardized treatment and strengthen daily life management so as not to delay the disease.