Early stage of lung adenocarcinoma is low differentiated, there is no way to determine the cure rate, and the clinical evaluation of the treatment effect is mainly based on the standard of 5-year survival rate, which can reach more than 80%. Early stage of lung adenocarcinoma mainly includes stage I and carcinoma in situ, the tumor is less than three centimeters and has not invaded the main bronchus, even if it belongs to hypofractionated, the effect is better after surgical resection. Even if the tumor is hypofractionated, the result is relatively good after surgical resection. If necessary, if the tumor is controlled by postoperative adjuvant chemotherapy, the five-year survival rate can reach more than 80%, and part of the population can even survive for a long period of time without recurrence and metastasis to reach the clinical cure status. The cure rate of lung adenocarcinoma in early stage with low differentiation is relatively low compared with other high differentiation, and a little bit better than undifferentiated, but it can’t be generalized, the condition is different, the treatment method is different, and the prognosis varies from person to person. However, early stage lung adenocarcinoma often has a better prognosis than middle and late stage. Clinically, as the stage of lung adenocarcinoma gradually increases, the prognosis will gradually deviate. To improve the survival rate is mainly to achieve early detection, early diagnosis and early treatment.