The patient was admitted to the hospital with “multiple polyps in the colorectum found on physical examination for 3 years”. 3 years ago, rectal polyps were found during “mixed hemorrhoid” surgery in a local hospital, and multiple polyps in the colorectum were found on colonoscopy. Pathology: villous-tubular adenoma with focal high-grade intraepithelial neoplasia. In August 2012, the polyp was removed by colonoscopy again, and the pathology showed tubular adenoma. The patient had no abdominal pain, bloating, nausea and vomiting, no feeling of urgency, normal stools, no bloody stools, and no fever. The patient was admitted to the outpatient clinic as “colorectal polyp”. Specialized examination: flat abdominal wall, normal respiratory movements, no rash, streaks, scars, masses, no abdominal wall varices, no gastrointestinal pattern and peristaltic waves. The abdomen was soft, with no pressure pain, no rebound pain, and no abdominal masses were palpable. The liver and spleen were not palpable under the ribs, and there was no percussion pain in the hepatic area and bilateral renal areas. The abdomen was negative for mobile turbid tones, and the bowel sounds were normal at 4 beats/min. Anal examination: left-sided position: anal finger examination revealed multiple small rectal masses, about 0.2-0.5 cm in size, with smooth surface and no blood staining in the finger sleeve. Colonoscopy: multiple polyps (number >100) in the whole colon and rectum; hemorrhoids. Gastroscopy: multiple polyps in the stomach. Thoracoabdominopelvic enhanced CT: Intragastric, shown left hemithorax-rectum diffuse multiple polyps. Diagnosis: FAP Surgical treatment: laparoscopic total colorectal resection + ileal pouch-anal tube anastomosis + ileostomy. Postoperative recovery was possible because of the prophylactic stoma, water on the first postoperative day, food on the second day, removal of the tube within three days, and discharge on seven days. The patient underwent total colectomy, attention to postoperative hydropower disorders, prophylactic ileostomy, attention to medication to regulate stool, dry meals mainly, in addition, the patient low rectum was also removed, attention to postoperative anal function exercise, review attention to assess anal function.