Combination of Radiotherapy and SHR-1210 to Treat Patients With ESCC

Inclusion Criteria: 1. age:18-75 years, male or femal. 2. Histologically confirmed primary Squamous Cell Carcinoma of the Esophagus,Local advanced esophageal cancer diagnosed by pathology and imaging,clinical stage T3-4N0M0, T1-4N+M0,Ⅱ-Ⅳa. 3. Pre-treatment evaluation can not tolerate concurrent radiochemotherapy or rejection of the concurrent use of chemotherapy with radiotherapy. 4. Measurable disease based on Response Evaluation Criteria In Solid Tumors (RECIST) 1.1. 5. ECOG 0-1. 6. Adequate organ function. 7. Life expectancy of greater than 6 months. 8. Patient has given written informed consent. Exclusion Criteria: 1. Patients who have or are currently undergoing additional chemotherapy, radiation therapy, targeted therapy or immunotherapy. 2. Known history of hypersensitivity to macromolecular protein preparation or any components of the SHR- 1210 formulation. 3. Subjects before or at the same time with other malignant tumors (except which has cured skin basal cell carcinoma and cervical carcinoma in situ); 4. Subjects with any active autoimmune disease or history of autoimmune disease 5. Uncontrolled clinically significant heart disease, including but not limited to the following: (1) \> NYHA II congestive heart failure; (2) unstable angina, (3) myocardial infarction within the past 1 year; (4) clinically significant supraventricular arrhythmia or ventricular arrhythmia requirement for treatment or intervention; 6. Active infection or an unexplained fever \> 38.5°C during screening or before the first scheduled day of dosing (subjects with tumor fever may be enrolled at the discretion of the investigator); 7. Received a live vaccine within 4 weeks of the first dose of study medication. 8. Pregnancy or breast feeding. 9. Decision of unsuitableness by principal investigator or physician-in-charge.