Colonic polyps are a general term for bulging lesions of the colon and rectum, which are common benign lesions of the large intestine. The mechanism of its occurrence is still unclear, but it may be related to infection, age, genetics, lifestyle, inflammatory bowel disease and other factors. Its clinical manifestations vary, and there may be no symptoms in the early stage, but the general clinical manifestations may include abdominal pain, diarrhea, constipation, blood in stool, mucus in stool, or a feeling of urgency. The polyps are of different sizes and can be distributed in any part of the large intestine; they can be single or multiple. According to the morphology, they can be divided into tipped polyps, subtibial polyps and broad-based polyps; according to the pathological types, they can be divided into adenomatous polyps, misshapen polyps, inflammatory polyps and hyperplastic polyps, among which adenomatous polyps used to be divided into three types: tubular, villous and tubular-villous, and in recent years, serrated adenomas. The most common types of polyps are inflammatory polyps and adenomatous polyps. The former is associated with inflammatory response of the colon, while the latter is caused by the imbalance of cell renewal on the surface of the colonic mucosa. Inflammatory polyps can disappear on their own after the inflammation is cured. As for adenomatous polyps, although they are benign lesions, we must be vigilant because studies have shown that adenomatous polyps are closely related to colorectal cancer, and more than half of colorectal cancers originate from adenoma carcinoma. The carcinoma of adenomatous polyps is related to the type, size and number of pathologies. Among them, the carcinoma rate of villous adenoma is up to 40%, tubular adenoma is 4%-4.8%, tubular villous adenoma is between the first two, and serrated adenoma is 20%-50%. The higher the number of adenomas, the higher the chance of cancer. More than 100 adenomas are adenomatous diseases, such as familial adenomatosis, if left untreated, about 75% of them become cancerous before the age of 35, and almost all of them develop into cancer before the age of 50. The duration of carcinoma is a longer process, averaging 10-15 years. It is worth noting that hyperplastic polyps, which were considered to have no tendency to become malignant in the past, are now considered to be closely related to serrated adenoma and serrated adenocarcinoma and are receiving more and more attention. Colonoscopy is currently the method of choice for the detection of colon polyps. A study at Duke University Medical Center showed that the sensitivity of colonoscopy for detecting ≥10mm lesions was 98% and 99% for detecting 6mm-9mm lesions, both higher than other traditional screening methods, and the specificity was close to 100%. For patients who are older than 40 years old, have a history of smoking and drinking, have a family history of colorectal polyps, and have the above clinical manifestations, colonoscopy is recommended as soon as possible. If patients have colorectal polyps, electrocoagulation treatment under colonoscopy is feasible.