Small bowel disease has always been a difficult problem for clinicians. The small intestine is located in the middle of the digestive tract, with a total length of 5-7 meters. Upper gastrointestinal endoscopy and colonoscopy can only observe a small part of the small intestine, and the small intestine is characterized by many curvatures, peristalsis, and unstable position. In the past, the small intestine was a medical examination. The "blind spot" of small bowel disease is seriously lagging behind.