Lung adenocarcinoma stage Ib belongs to early stage lung cancer, and the treatment is mainly based on surgery. Whether it is possible to take targeted drugs or not, it is necessary to determine the specific genotype before applying. Stage Ib lung adenocarcinoma means that the tumor is larger than 3cm and invades the main bronchus but not the rump. There is obstructive pneumonia, but it has not spread to the whole lung, and the lesion is relatively limited. Surgery is the first choice, and after surgery, chemotherapy and other treatments are supplemented according to the condition in order to reduce the probability of recurrence and metastasis, and the prognosis is relatively good. Targeted drugs are mainly used to kill tumor cells at the target point of tumor cell gene mutation, and genetic test is needed before use. People with gene mutation can choose appropriate targeted drugs according to the mutation type according to the doctor’s instruction. Stage Ib lung adenocarcinoma belongs to early stage, and the prognosis is relatively good after surgical resection, so it is recommended to carry out standardized treatment under the guidance of clinicians.