Stage Ib lung cancer belongs to the early stage of lung cancer. The TNM stage corresponding to stage Ib lung cancer is T2N0M0, which belongs to the early stage of lung cancer.T2 refers to the invasion of the primary tumor, and is defined as T2 when any of the following conditions are met: ① the maximum diameter of the tumor is >3-5 cm; ② invasion of the main bronchus without invading the rudiment; ③ invasion of the pleura of the visceral layer; ④ there is obstructive pneumonitis, or partially or totally atelectasis.N0 refers to the absence of regional lymph node metastasis, and M0 refers to the absence of distant metastasis. N0 means no regional lymph node metastasis and M0 means no distant metastasis. In this period, the lesions are still limited, and most of them are preferred to be treated by surgery, which is supplemented by radiotherapy and other treatments according to the condition, and the prognosis is generally better. After surgery, the patient should strictly follow the doctor’s instructions for regular checkups in order to find out the changes of the disease as early as possible. It should be noted that the treatment of lung cancer not only needs to be based on the stage of lung cancer, but also needs to take into account the patient’s underlying disease, willingness to treatment, etc., and emphasize on individualized treatment in a comprehensive consideration. It is recommended that patients should consult doctor in time and get treatment as early as possible to avoid delaying their condition.