The neoadjuvant strategy of immunotherapy combined with chemotherapy has been recommended for resectable or potentially resectable tumors without driver-gene alterations.However, the AE of chemotherapy is more than 40%，which bring fear to the patients，especially for those who cannot tolerate or refuse chemotherapy.Several studies indicated that the strategies of chemo-free ,such as the combination of immunotherapy with antiangiogenic therapy or with SBRT, were safe and well tolerated, without increasing adverse reactions. Both of them have a promising efficacy with a manageable toxicity profile in patients with resectable NSCLC. The investigators aim to assess the activity and safety of neoadjuvant SBRT and immunotherapy plus antiangiogenic therapy in patients with resectable NSCLC.

Inclusion Criteria:

1.18 years or older 2. Eastern Cooperative Oncology Group performance status: 0 or 1 3. Clinical stage IB to IIIB (T3-4N2) Resectable NSCLC 4. Adequate cardiopulmonary and haematological function.

Exclusion Criteria:

1. Known EGFR-sensitising mutations and EML4-ALK fusions
2. Concomitant malignancy, history of another cancer within the past 3 years.
3. Current or previous use of immunosuppressive medication,active autoimmune disease, and interstitial lung disease or idiopathic pulmonary fibrosis on a screening radiographic scan