Abstract: Objective To analyze the outcome and influencing factors of radiotherapy in elderly esophageal cancer patients.Methods Seventy patients over 70 years with esophageal cancer were treated mainly by radiotherapy from January 2001 to December 2007.recent effect,the 1、2、3 year survival rate and it′s influencing factors,toxic side effects were analyzed retrospectively.Results After radiotherapy for 70 patients with esophageal cancer,the total effect rate was 88.5%(62/70).The 1、2、3 year survival rate and disease free survival is 62.28% and 10.80%、27.51% and 7.20%、13.89% and 3.40%,respectively.Using univariate and multivariate analysis,focal length and whether there is metastasis were significantly associated with the survival rate.Conclusion Radiotherapy for elderly patients with esophageal cancer had significant effect and well tolerated;focal length and whether there is metastasis were the main survival-related prognostic factors.