Recently, the City Hospital of Traditional Chinese Medicine successfully performed another radical and low anus-preserving surgery for a patient with post-operative anastomotic recurrence of sigmoid colon cancer, marking the hospital’s first-class level of colon cancer surgery in China. Patient Liang had sigmoid colon cancer resection in a foreign hospital 3 years ago, and came to the hospital 1 month ago with abdominal distension, abdominal pain, unable to ventilate and defecate. Director Li Shengming of the Department of Proctology performed colonoscopy for him and found that the anastomotic tissue was hyperplastic and narrow, thus considering the recurrence of anastomotic cancer, and taking mucosal tissue biopsy confirmed Director Li’s judgment. The next operation posed a dilemma for the surgeon: how to ensure the tumor was eradicated while preserving the patient’s bowel function. Because the sigmoid colon was removed after the last surgery and the anastomosis was low, according to the traditional surgery, after the complete removal of the tumor, another stool outlet would be made in the abdomen, which is commonly known as “artificial anus”, which would definitely bring great mental burden and inconvenience to the patient in the future. Director Li carefully analyzed the patient’s clinical data and boldly suggested the possibility of anus preservation. Due to the second surgery, the abdominal cavity was disturbed and the tissues were severely adhered. During the operation, Director Li successfully separated the tumor from the normal tissues and cut off the tumor with some normal tissues completely with his skillful surgical technique and good knowledge of anatomy. Finally, a low-level anastomosis between the colon and the rectum was performed in the deep pelvic cavity with an anastomosis clutch, and the operation was successful. On the third day after the surgery, the patient started to pass gas anally and defecate, and did not see the dilemma of carrying a bag of feces, and her emotional performance was very good, and she is now discharged from the hospital. Two months later, we followed up with the patient and he had resumed his normal life and work, and there was no sign of recurrence of the anastomosis.