Chemotherapy is not needed after surgery for early stage of lung adenocarcinoma. In the early stage of lung adenocarcinoma, since the tumor is smaller and the invasion is less, surgery can be performed for complete resection and the risk of recurrence and metastasis is less after surgery, so chemotherapy is not needed after surgery. At present, the treatment of lung adenocarcinoma is based on the patient’s organism condition, immune function condition, the specific site of lung adenocarcinoma, pathological type, the scope of lung adenocarcinoma invasion and development tendency, the degree of cell differentiation, biological behavior, structural and functional changes of genes related to lung adenocarcinoma, as well as individualized staging and individualized molecular staging combining biological behavior and molecular biology of lung adenocarcinoma, and the rational and planned comprehensive application of the existing The aim is to prolong the life of patients and improve the quality of life of lung adenocarcinoma patients, while in the early stage of lung adenocarcinoma, surgery can achieve the purpose of cure, and chemotherapy is not needed after surgery.