Any visible protuberance on the mucous membrane, regardless of location, size, shape and tissue type, is called a polyp. The term “polyp” is in fact a generalized concept that does not indicate the nature of the lesion, and the final decision is made by the pathology. Colorectal polyps are elevations above the mucosa in the colorectal area that have not yet been histologically diagnosed. Since some intestinal polyps can become cancerous, both doctors and patients take intestinal polyps very seriously in clinical practice, and even if electrosurgery or excision has been performed, they must be reviewed periodically to check for recurrence, and pathology must be available to characterize each recurrence. It is reported that the cancer rate of villous adenoma (a kind of intestinal polyp) larger than 50px is about 50%, and the longer the tip is, the higher the cancer rate is. With the improvement of people’s living standard, the incidence of intestinal polyps is obviously increased in those who eat high fat, high protein and low fiber for a long time; secondly, those who smoke a lot of cigarettes and drink a lot of alcohol for a long time will also lead to the occurrence of this disease due to the decrease of immune function; furthermore, the genetic factors can not be ignored. Generally the main manifestation of colorectal polyps is blood in the stool, diarrhea or mucous blood stool. Long-term chronic small amount of bleeding will also cause varying degrees of anemia; intestinal polyps diarrhea is generally chronic, ranging from 2 to 4 times a day, rarely abdominal cramps (unless there is intestinal obstruction) and fever, due to adenomas can secrete a large amount of mucus, so most of the patients are mucous blood stools, such as adenomas are located in the rectum will also be the rectal drop and other symptoms. The most direct and effective way to check colorectal polyps is fiber colonoscopy, due to the wide application of this technology, more and more scholars on the occurrence of rectal polyps, development and treatment of more in-depth research, in order to effectively prevent and early diagnosis, early treatment of colorectal polyps, reduce the occurrence of intestinal cancer. In Europe, people have already taken fiber colonoscopy as one of the routine checkups, and our country is now paying more and more attention to colonoscopy, generally where fecal occult blood is positive, blood dripping from the stool, sudden changes in the number of bowel movements, colonoscopy should be recommended, especially when the patient reports that there is more bleeding, and anoscopy did not see any obvious bleeding points should be more attention. Clinically, colorectal polyps are mainly categorized into neoplastic polyps, non-neoplastic polyps and submucosal damage. Neoplastic polyps, also known as adenomatous polyps, include tubular adenomas, tubular villous adenomas, and villous adenomas. These three types of polyps are often referred to clinically as precancerous lesions. In particular, choriocarpous adenomas are prone to malignant transformation, followed by tubular choriocarpous, and tubular adenomas have relatively few malignant transformations. Non-neoplastic polyps refer to hyperplastic polyps, misshapen polyps, mucosal redundancies and inflammatory polyps. Submucosal damage refers to intestinal gas cysts, lymphoid polyps, and lipomas.