1.Minimally invasive treatment The principle of treatment of gastrointestinal polyps is to remove them as soon as they are found, and the choice of treatment plan depends on their location, the presence or absence of the tip, size and malignant potential. Minimally invasive treatment is mainly endoscopic high-frequency electrocoagulation polypectomy, or laser or microwave resection. The polypectomy is carried out in the absence of coagulation mechanism. After surgery, the polypectomy is treated with a small amount of fluid or fasting for 1 to 3 days, activity is limited, and intravenous hemostasis (e.g., 3.0 g/d of phenolsulfonamide), anti-inflammatory (antibiotics for gram-positive bacteria), and intestinal mucosa protection (double octahedral montmorillonite, etc.) are given. Perforation occurs. (1) High-frequency electrocoagulation resection: according to the shape, size, number of polyps, and the presence or absence of the tip, length and thickness of the following methods can be used. ①High-frequency electrocoagulation cauterization method: mainly used for multiple small polyps of hemispherical shape. ②High-frequency electrocoagulation capsulectomy method: mainly used for polyps with tips. ③”Dense connection” removal method: mainly used for long-tipped large polyps, difficult to suspend in the intestinal cavity using large polyps dense intestinal wall electrocoagulation resection method. ④High-frequency electrocoagulation hot biopsy forceps method: rarely used at present. (2) Biopsy forceps method: mainly used for single or a few small globular polyps, simple and easy, and can be biopsied for pathological examination. (3) Staged removal method: mainly used for patients with 10-20 polyps that cannot be removed at one time. (4) Laser vaporization method and microwave diathermy method: applicable to those who do not need to keep histological specimens. 2. Those who need surgical treatment. Surgical indications are: more than 10 multiple adenomas with large size and confined to a certain intestinal segment; larger polyps blocking most of the intestinal lumen with poorly displayed tips or broad-based adenomas with basal diameter > 2 cm. adenomas of the large intestine have a high recurrence rate after resection and have the possibility of multiple adenomas. a careful clinical follow-up plan should be developed according to the histological type of the patient to detect the lesions early and give timely treatment. Malignant colorectal polyps are adenomas that contain invasive cancer cells and have cancer cells crossing the mucosal muscle layer into the submucosa. In contrast to adenomas with severe atypical hyperplasia, cancer cells in malignant adenomas are not confined to the mucosa, and therefore, there is a possibility of metastasis. The indication for surgical treatment of colonoscopically resected malignant polyps should be determined according to whether cancer cells remain in the basal part of the polypectomy or whether there are lymph node metastases. Colonoscopically when a polyp is suspected to be malignant, the endoscopist should first estimate whether it can be resected endoscopically. Tender or small non-tipped polyps can be completely removed, while large non-tipped polyps should be biopsied first. After the polyp has been removed, all tissue should be sent for pathological examination (i.e., whole tumor pathology) and the site where the polyp is located should be described in detail, as surgical treatment is necessary if the polyp is found to be malignant. Indian ink can also be injected into the intestinal wall at the site of polyp removal, leaving a permanent localization mark for possible future surgical sites. 3.Follow-up As colorectal polyps, especially adenomatous polyps, have been recognized by scholars as pre-cancerous lesions or states, regular follow-up of patients with colorectal polyps has been highly recognized to prevent and treat early colorectal cancer. Regular follow-up of colorectal polyps, especially adenomatous polyps, is an important part of preventing polyps from becoming malignant. The redetection rate of polyps is high, ranging from 13% to 86% as reported abroad. In addition to some of the newly detected polyps, some of them are new polyps and missed polyps in the colon. In order to maintain the polyp-free status of the intestine and prevent the occurrence of colorectal cancer, it is necessary to develop a cost-effective follow-up program. (1) Low-risk group: any single, tipped (or broad-based), but <2 cm tubular adenoma with mild or moderate atypical hyperplasia. Adenomas in the low-risk group are reviewed 1 year after adenoma removal, and if negative can be examined every 3 years for a total of 2 examinations, and then every 5 years. However, a fecal occult blood test must be performed annually during the follow-up. Endoscopic removal of polyps will be performed once they are found during the follow-up. (2) High risk group: Those who have one of the following conditions are at high risk: multiple adenomas, adenomas >2 cm in diameter, broad-based villous or mixed adenomas, adenomas with severe atypical hyperplasia or in situ carcinoma, adenomas with invasive carcinoma. The follow-up plan for the high-risk group is to have an endoscopy 3-6 months after adenoma resection, and another one every 6-9 months if negative, and another one every 3 years if negative again, and a fecal occult blood test every year during this period.