对12例低位直肠恶性肿瘤患者行Miles术时应用改良会阴部肛门成形术,术后随访3年生存率为83.3%,排便控制能力与术后时间成正比,疗效较为满意.探讨了手术适应症及注意点,强调重建结肠骶曲和盆底,增加机械屏障作用,对控制排便功能十分重要. 12 patients with low rectal cancer patients underwent Miles surgery improved perineal anoplasty, follow-up 3-year survival rate was 83.3%, bowel control and postoperative duration is proportional to the efficacy is satisfied. To discuss the surgical indications And pay attention to, emphasizing the reconstruction of the colon and sacral curvature of the pelvic floor, increasing the role of mechanical barriers to control defecation is very important.