One day before the rectal polypectomy under fiberoptic colonoscopy, you should eat a liquid diet, and the night before and the morning of the operation, you should take Hengkang Zhengqing Oral Liquid orally to cleanse the intestines. Fasting should be given within 12 hours after rectal polyp surgery to avoid food residues damaging the trauma and causing acute bleeding. 1-2 days after surgery, you should eat a paste and pure liquid diet, such as boiled noodles, rice paste, etc., to avoid constipation, which leads to dry stools. In 3-7 days after surgery, you can gradually eat semi-liquid food, such as thin rice, noodles, etc., according to the intestinal condition, and after 7 days, you can resume normal diet. If symptoms such as black stool, blood in stool and abdominal pain occur within one month after surgery, you should contact the operating hospital and the doctor in charge in time to avoid serious consequences.