The aim of this study is to investigate the effect of postoperative concurrent chemoradiotherapy versus radiotherapy alone for patients with locally advanced esophageal squamous cell carcinoma.

Inclusion Criteria:

1. biopsy-confirmed esophageal squamous cell carcinoma
2. age ≤ 70 years old,
3. Karnofsky performance status ≥ 70,
4. R0 esophagectomy according to the pathological examination of the resected specimens,
5. postoperative stage Ⅱ-Ⅳa according to the AJCC 7th edition of tumor-node-metastasis (TNM) classification for esophageal carcinoma
6. Adequate organ functions (1).white blood cell (WBC) ≥3×109⁄L; (2).Absolute neutrophil counts (ANC) ≥1.5×109⁄L; (3).Hemoglobin (Hb) ≥10g⁄dl; (4).Platelet (Plt) ≥100×109⁄L; (5).Total bilirubin <1.5 upper limit of normal (ULN); (6).Aspartate transaminase (AST) ≤2.5 ULN; (7).Alanine aminotransferase (ALT) ≤2.5 ULN; (8).Creatinine ≤1.5 ULN; (9).adequate pulmonary function (FEV1>0.8 L;.
7. no previous treatment or severe complications
8. Written informed consent

Exclusion Criteria:

1. previous treatment with chemotherapy or radiotherapy
2. greater than 3 months after surgery
3. complete esophageal obstruction after surgery, esophageal perforation;
4. other malignant tumors, except for skin basal cell carcinoma, or cervical carcinoma in situ, who survived with no evidence disease for over 3 years;
5. pregnant or breast-feeding women；
6. patients with any serious concurrent disease, such as severe diabetes, uncontrolled hypertension, serious chronic obstructive pulmonary disease；
7. drug addiction, Alcoholism or AIDS;
8. uncontrolled seizures or psychiatric diseases, loss of control over their own behavior;
9. with clear chemotherapy drug allergy
10. participation in other interventional clinical trials within 30 days;