目的探讨放射治疗对复发性直肠癌的治疗效果。方法４４例复发性直肠癌，１９例行手术切除，２５例行放射治疗，剂量４０～７０Ｇｙ，常规分割方法。结果照射后会阴部疼痛、出血症状均有减轻，乃至消失，会阴部肿块照射后缩小１／２以上者占５５％（５／９）。放疗组１年生存率５２％、３年生存率１６％，好于手术组的４２．１％、１０．５％。结论放射治疗在直肠癌术后复发的治疗中起到减轻症状、使肿瘤缩小、延长生存期作用，照射剂量不宜低于６０Ｇｙ。 Objective To investigate the effect of radiation therapy on recurrent rectal cancer. Methods 44 cases of recurrent rectal cancer were performed. 19 cases underwent surgical resection, 25 cases underwent radiation therapy, and the dose was 40-70 Gy. Results The perineal pain and hemorrhage were all reduced or even disappeared after irradiation. 55% (5/9) of the perineum mass was reduced by 1/2 or more after irradiation. The radiotherapy group had a 1-year survival rate of 52% and a 3-year survival rate of 16%, which was better than 42.1% and 10.5% of the surgery group. Conclusion Radiotherapy can reduce the symptoms, shrink the tumor, and prolong the survival of the patients with rectal cancer recurrence. The radiation dose should not be lower than 60 Gy.