Colonic adenoma is a common polyp on the mucosal surface of the large intestine, which is a precancerous lesion of colorectal cancer and has the potential to become malignant into colorectal cancer, and requires timely colonoscopic adenomectomy and regular postoperative follow-up colonoscopy to monitor whether adenomatous polyps have recurred. Colonic adenomas are polyp-like elevations on the mucosal surface of the large intestine and are divided into tubular adenomas, villous adenomas, and tubular choriocapillaris adenomas. Among them, villous adenoma has a higher risk of cancer, while tubular adenoma has a lower cancer rate, but adenomas over 1 cm with intraepithelial neoplasia are all high-risk adenomas and have a higher risk of progression to colorectal cancer. In most cases, adenomas are not clinically symptomatic and are often detected during colonoscopy and further pathological tests are performed to indicate adenomatous polyps. In the case of larger adenomatous polyps, such as 2-3 cm or more in diameter, gastrointestinal symptoms such as abdominal pain and blood in the stool may occur. Once colorectal adenoma is detected clinically, endoscopic adenomatous polyp resection is generally recommended to prevent cancer, by endoscopic argon ion beam coagulation, endoscopic mucosal resection, endoscopic submucosal dissection, etc. The surgery is less invasive and the postoperative recovery is relatively fast.