Abstract: Objective:To explore the curative efficacy of sphincter-preserving surgery in the treatment of patients with super low rectal carcinoma. Methods:Fifty-four patients with super low rectal cancer received anal preservative operation were analyzed,inspecting anal function assessed after operation,and follow-up for 1,3,12 months. Results:All the cases were followed up for at least 16 months to 48 months. All patients were operated with no death and no anastomotic infection. Only one case suffered remained cancer cells in cutting margin,three cases anastomotic leakage and three cases anastomotic narrow. Two received Mile operation after 6 months because of local recurrence. Two patients died of other disease. Conclusions:By strict selection of cases, improving anastomosis and improving perioperative management, anal sphincter preserving operation is an ideal surgery choose for the patients with super low rectal cancer. The operation used in patients gave better functional results of treatment and better quality of their life.