(i) Postoperative anastomotic bleeding, mostly related to the design of the anastomotic titanium nail, the patient’s overly hypertrophic anal pad, incomplete intraoperative hemostasis and the patient’s postoperative bowel movements. ② Urinary retention, which may be related to postoperative pain, abdominal distension and other discomforts. ③ Rectovaginal leakage and rectal perforation are related to purse-string suturing beyond the rectal muscle layer. ④Anastomotic stricture is mostly caused by the purse-string suture with the muscular layer, the anastomosis not being in one plane, or the patient not having a shaped stool for a long time when the anastomosis is formed. ⑤ Sensory incontinence and increased frequency of defecation may be caused by surgical removal of the submucosal plexus, reduction of the rectum by pulling the rectum, and thinning of the sphincter by pulling and stretching after surgery. (6) Postoperative swelling and pain are related to the absorption of the anastomotic intestinal line and submucosal hematoma, which can mostly improve on their own. (7) The formation of anal myxoma may be caused by long-term inflammation stimulating anastomotic tissue hyperplasia. ⑧The premature detachment of the titanium nail and the unadhered tissue of the upper anal pad can lead to partial ectasia of the external hemorrhoid below the anastomosis to form a mass prolapse affecting the surgical effect, which may be related to the still high pressure in the anal canal after surgery and the patient’s dry stool and diarrhea. 9 Pelvic sepsis and retroperitoneal infection, although not yet reported in China, are prevented by the routine use of generalized antibiotics after surgery.