There are two types of colonoscopic polyps: one is hyperplastic polyps and the other is adenomatous polyps. For hyperplastic polyps, most of them originate from the mucosal layer, with prominent elevation of the mucosal layer, accompanied by inflammatory hyperplasia, showing subtibial or broad-based changes, and can be removed endoscopically within 2-3 cm, generally with smooth surface and clear surrounding borders. Most adenomatous polyps have tubular or adenoid openings with clear borders, but the surface is congested and eroded, and some severe adenomas are eroded and congested, and even cancer may occur. Some of these polyps may infiltrate into the submucosa, which needs to be further ruled out by CT examination or ultrasound endoscopy, or additional surgical treatment if they infiltrate into the vasculature.