Gastrointestinal polyps are swellings formed by limited hyperplasia in the mucosa of the gastrointestinal tract. Gastrointestinal polyps can be divided into gastric polyps, duodenal polyps, small intestine polyps and colorectal polyps according to the location of the lesion, with colorectal polyps being the main site of incidence. Gastric polyps have no obvious clinical symptoms in the early stage, and only when accompanied by comorbidities do they show upper abdominal discomfort, pain, nausea, vomiting or bleeding; pyloric polyps with tips in the pylorus often cause intermittent pyloric obstruction. Colorectal polyp symptoms are more common, colorectal polyps, if larger, often subject to fecal friction, can make its mucous membrane erosion, fecal blood and mucus, the symptoms are bright red stool blood, not much blood, mixed with mucus, blood on the surface of the feces, if the bleeding volume, or bleeding for a long time, can cause wasting, anemia, polyps, when larger, can also appear in the urgency, constipation, more anal discharge, etc. symptoms. Polyp histology can be divided into 4 categories: tumor polyp, misshapen polyp, inflammatory polyp and hyperplastic polyp. Inflammatory polyps are related to the inflammatory response of the intestine and grow very slowly and are basically not cancerous. In contrast, adenomatous polyps are divided into adenomatous ductal adenomas, villous adenomas, and villous adenomatous ductal adenomas, and these adenomatous polyps are most likely to become cancerous. According to research, the cancer rate of adenomatous polyps is about 5%-40%, among which the cancer rate of villous adenoma is the highest, and the larger the polyp, the greater the chance of cancer. Currently, high-frequency electrocoagulation is the most important and commonly used endoscopic treatment for polyps. This method uses high-frequency current to cauterize and cut off the tissue in contact with the trap, removing the polyp completely and quickly and stopping the bleeding completely. This method is not only easy to perform, painless for the patient, inexpensive, with fewer complications, but also allows obtaining pathological findings of the entire polyp. There are also high-frequency electrocautery, laser therapy, microwave therapy, injection removal, cryotherapy, biopsy clamp removal method, staged batch removal method, combined endoscopic surgical treatment method, and other methods. Given that patients are prone to gastrointestinal polyps with recurrence, polyps should be closely followed up after surgery. It is generally accepted that a single adenoma should be removed and followed up once in the first year after surgery, or every 3 years if the test is negative. For multiple adenoma resection or adenoma larger than 20 mm with atypical hyperplasia, the follow-up should be once every 3-6 months, or once every 1 year if negative, or once every 3 years if negative twice in a row, with a follow-up period of not less than 15 years.