How long non-small cell lung adenocarcinoma can live is related to the stage of the disease and the patient’s physical condition, and cannot be generalized. Lung cancer can be divided into non-small cell lung cancer and small cell lung cancer according to the pathological type, and lung adenocarcinoma belongs to a type of non-small cell lung cancer. Lung adenocarcinoma is commonly found in women and long-term smokers. After early radical surgery, the 5-year survival rate is about 90% and can even achieve clinical cure. The 5-year survival rate for stage II patients is about 70%, and for stage III patients is about 30%. Patients with advanced stage, i.e. stage IV lung adenocarcinoma, generally have a 5-year survival rate of about 10%, and if they have EGFR gene mutation, their survival period is relatively longer than those without mutation. Once lung adenocarcinoma is detected, patients should go to the respiratory department or oncology department of regular hospitals as soon as possible, and the survival rate can be improved through surgery, radiation and drug treatment.