Relying on the data of lung cancer tumor 1.9*1.8 alone, it is not clear how to treat lung cancer; the treatment of lung cancer needs to be considered in combination with pathological type, clinical stage and other factors, and common treatments include surgery, chemotherapy, radiotherapy, targeted therapy, immunotherapy and so on. 1. Surgery: Surgery is the main treatment method for early lung cancer, which can be divided into extended resection (such as double lobectomy, bronchial sleeve lobectomy, pulmonary artery sleeve lobectomy, etc.) and local resection (segmental resection and wedge resection). 2. Chemotherapy: it is used in the treatment of patients with advanced stage or recurrence of lung cancer, and can also be used in the adjuvant chemotherapy of postoperative patients, preoperative neoadjuvant chemotherapy and integrated treatment with combined radiotherapy. It kills cancer cells or prevents their growth through oral or injection of chemical drugs, and commonly used drugs include platinum (cisplatin, carboplatin), gemcitabine, pemetrexed, paclitaxel (paclitaxel, docetaxel) and so on. 3. Radiotherapy: radiotherapy has the best curative effect on small cell lung cancer, followed by squamous cell carcinoma and adenocarcinoma. Depending on the purpose of treatment, radiotherapy modes are different. For example, radical radiotherapy is suitable for those with limited lesions, inoperable due to anatomical reasons or inoperable due to other reasons, and the efficacy can be improved if supplemented with chemotherapy. 4. Targeted therapy: at present, targeted therapy is mainly applied to patients with adenocarcinoma in non-small cell lung cancer, and commonly used drugs include erlotinib, gefitinib, crizotinib, bevacizumab and so on. 5. Immunotherapy: including monoclonal antibodies of PD-1, such as pembrolizumab, nabulizumab, sindilizumab, karelizumab and so on. Besides, there are also monoclonal antibodies of PD-L1, including the drugs of Duvarizumab and Atelizumab. To summarize, the treatment plan of lung cancer needs to synthesize various factors, and it is recommended that patients follow the doctor’s instructions to take active treatment.