Lung adenocarcinoma stage 1b generally does not need chemotherapy after complete resection by surgery in early stage, but patients with high-risk factors may undergo chemotherapy to reduce the recurrence rate. Lung adenocarcinoma stage 1b, as a kind of malignant tumor with benign cytological features, has a better prognosis than other organs and can usually be completely removed by surgery, so chemotherapy is not needed. Generally speaking, treatment at this stage is basically curable. Lung adenocarcinoma stage 1b will have the possibility of clinical lesions afterward if it is not completely resected by surgery, so such patients need 4 cycles of adjuvant chemotherapy to reduce the risk of recurrence and metastasis. In addition, it is still controversial whether to continue chemotherapy for stage 1b lung adenocarcinoma in clinic, and whether to chemotherapy or not needs to be determined by the doctor according to the actual situation of the disease. Early detection and early treatment are recommended, which can enhance the survival rate and cure rate greatly.