Patients with postoperative lung cancer need to judge whether to undergo chemotherapy according to their morbidity, the details of which are as follows: 1. chemotherapy is not needed: the mass is found relatively early, and the mass lesion is less than 2 cm, there is no distant metastasis, no cancer cells are found in the bronchial stump after resection through surgery, and the pathology report shows no lymph node metastasis, in line with the above, then chemotherapy is not needed; 2. chemotherapy is needed: the patient’s mass is relatively large, there is Mediastinal lymph node metastasis or even pleural metastasis, or regular postoperative review reveals signs of metastasis in other organs, then patients are recommended to undergo consolidation chemotherapy, which usually takes 4-6 courses, to play a therapeutic role in concert with surgery, to better improve patients’ quality of life and prolong their survival time.