Benign tumors of the large intestine are mostly polyp-like in appearance on colonoscopy, and are collectively referred to as colorectal polyps with non-neoplastic mucosal elevation lesions. Epidemiological studies have found that the risk of colorectal cancer in colon polyps is 22 times higher than that in non-polyp groups, and about 70% to 80% of colorectal cancers develop on the basis of polyps, which is the precursor of colorectal cancer. Colorectal polyps can have no clinical symptoms, and more than 50% of patients are found during physical examination. With the increase of polyp size, symptoms become obvious, which are manifested as different degrees of abdominal discomfort or abdominal pain, blood in stool, change of stool shape or habit, and even gastrointestinal hemorrhage, intussusception and intestinal obstruction. The appearance of symptoms is closely related to the histological type, site of occurrence, number and morphological characteristics of polyps. Based on the presence or absence of clinical symptoms is not very helpful for the diagnosis of colorectal polyps, much less has a confirmatory value, so once such diseases are suspected, colonoscopy should be performed as soon as possible to clarify the diagnosis. The principle of polyp treatment is to remove polyps when they are found. At present, endoscopic treatment has made great progress, and most polyps can be removed endoscopically. After the removal of polyps, colonoscopy should be repeated regularly to detect the recurrence of polyps and the presence of new polyps as early as possible.