After surgical resection for stage 1b squamous lung cancer, chemotherapy is needed if there are high-risk factors, and the specific therapy needs to be analyzed in the light of the disease. Stage 1b squamous lung cancer is the early stage of the disease, representing the maximum diameter of the primary tumor is 3~4 cm, or it involves the main bronchus, or accompanied by pulmonary atelectasis; there is no lymph node metastasis and distant metastasis. The lesions are relatively limited in this period and can be treated by radical surgical resection. If high-risk factors are present, adjuvant chemotherapy should be administered under medical supervision to reduce the probability of recurrence and metastasis. High risk factors mainly include the presence of malignant squamous carcinoma cells at the margins of the incision; residual squamous carcinoma cells in the bronchial stumps; and the presence of vascular cancer emboli in the resected lung parenchyma specimen. It is recommended that patients choose appropriate treatment methods under the guidance of doctors and actively treat the disease to avoid delay.