Colon polyps are divided into four types according to their pathological nature: 1. adenomatous polyps, also known as colorectal adenomas, where tumor and polyps are the same meaning. These polyps are most common in the rectum, more than 90% of which are found in the rectum, including tubular adenoma, villous adenoma, familial polyposis, etc.; 2, misshapen polyps, including childhood polyps, melanotic polyposis, etc.; 3, inflammatory polyps, including polyps caused by ulcerative colitis, Crohn’s disease, dysentery, and other inflammatory bowel diseases; 4, hyperplastic polyps, also called saprophytic polyps. The evolution and regression of colon polyps should be based on their pathological categories, adenomas, as they may be multiple or have cancerous coexistence, and there is increasing evidence that over time, under certain conditions, benign polyp-like tumors are subject to malignant transformation. Therefore, if the diameter of adenoma is greater than 2.5 cm, or if it is hard to the touch of fingers or instruments, or if it is obviously congested, or if there is ulcer on the surface, the possibility of carcinoma should be considered, and the possibility of carcinoma should be different depending on the nature and size of adenoma. Treatment: 1.Single polyp can be excised and examined at the same time; 2.Multiple polyps or polyps with large size can be performed by anal speculum and intestinal microscope for electrocoagulation and electrosurgery; polyps with cancer should be radical resection according to tumor.