Stage 2a lung tumor surgical resection plus follow-up treatment, the patient five-year survival rate of about 60%, but there are some differences in the specific survival period, can not be generalized, can be understood as a certain clinical cure rate. Lung malignant tumors can be caused by heredity, smoking, environment, etc. Stage 2a represents the situation where the primary tumor has a maximum diameter of 4~5cm, or involves the dirty layer of pleura, etc., with no lymph node metastasis, and no distant metastasis. This stage can usually be treated by surgical resection, and postoperative adjuvant treatment is often performed in order to improve the surgical resection rate and eliminate residual lesions. In order to improve the surgical resection rate and eliminate the remaining lesions, postoperative adjuvant treatments are often carried out, such as radiotherapy, chemotherapy, targeted therapy, etc. The five-year survival rate of patients with stage 2a lung cancer after active treatment is about 60%, and the prognosis can be effectively improved by paying attention to the regular postoperative rechecking, smoking cessation and maintaining good living habits. It is suggested that patients should go to regular hospitals for consultation in time and listen to professional doctors’ opinions.