We plan to recruit the patients who were pathologically confirmed with esophageal squamous cell carcinoma from the Oct 2014. The patients will be divided into three groups.Experimental group 1 : single drug Capecitabine and concurrent radiotherapy.Experimental group 2: Capecitabine plus oxaliplatin and concurrent radiotherapy. Control group:cisplatin plus 5-fluorouracil and concurrent radiotherapy. To evaluate the overall survival of the three group. Also observe the patient's progression-free survival, response rate, pathologic complete response rate and adverse events.