There is no such thing as whether capsule endoscopy or small colonoscopy is better for examining the small intestine, both have their own advantages and disadvantages and can complement each other. Small colonoscopy is the traditional way to check the small intestine, can take lesions to do biopsy, but also can do the corresponding treatment of lesions, such as polyps can be removed, small colonoscopy can also do marking, to provide convenience for the operation. The disadvantage is that it is more painful and risky. Capsule endoscopy is a capsule with camera function swallowed into the digestive tract, which can take pictures of the digestive tract. The operation is simple, non-invasive and painless, the disadvantage is that the image acquisition is random and uncontrollable, the tissue cannot be taken for pathological biopsy, and it may be embedded in the body or cause intestinal obstruction. Clinical need to check the small intestine should listen to the doctor’s advice, choose the examination suitable for their own condition, any discomfort timely consultation.