The experience and techniques of ultrasound diagnosis of intestinal polyps are summarized in the following 6 aspects: 1. sweep the intestine in segments and regions; 2. apply high frequency probes that can show the internal structure of the lesion; 3. pressurize appropriately to drive away intestinal contents and gas, which can easily detect the lesion; 4. show the lesion with the help of intestinal lumen gas; 5. apply Doppler to better show the lesion; 6. prepare the intestine if necessary and repeat the examination 6.If necessary, perform intestinal preparation and repeat the examination.