Lower gastrointestinal bleeding is defined as bleeding from the intestinal canal below the Treitz ligament in the displaced part of the duodenum and jejunum. The bleeding can come from the small intestine, colon and rectum, and the main clinical manifestation is fresh blood or black stool. The etiology of pediatric lower gastrointestinal bleeding is complex and can occur at any age in children. The widespread use of fiberoptic gastroscopy and fiberoptic colonoscopy has significantly increased the diagnostic rate of pediatric gastroduodenal bleeding and colonic bleeding. The small intestine is a blind area for gastroscopy and colonoscopy, and etiologic diagnosis and treatment are often more difficult. Among imaging examinations, isotope scan examination can diagnose Meckel’s diverticulum and intestinal duplication malformation, but its accuracy rate is only 50-70%, and there are certain false positives and false negatives; although selective angiography has some value for diagnosis, it can only show the bleeding site during the active bleeding period and when the bleeding rate is greater than 0.5 ml per minute. Therefore, the common clinical situation is that the child has bleeding in the lower gastrointestinal tract, the cause of which is unknown, and the doctor is afraid to operate for fear of “missing”; the parents of the child are also worried, afraid that the cause of the bleeding cannot be found by open surgery, and the child is wrongly subjected to a knife, thus delaying the child’s condition. In recent years, with the widespread development of lumpectomy technology, laparoscopic abdominal exploration provides a powerful means for the diagnosis and treatment of pediatric gastrointestinal bleeding. Doctors only need to punch three small holes of about 3mm in the abdominal wall of the child and place the lumpectomy to perform the operation; common causes of small intestinal bleeding in children are Merkel’s diverticulum, intestinal duplication malformation, hemangioma, etc., which are mostly manifested as lesions outside the intestinal cavity and are easily diagnosed by laparoscopic exploration; after the discovery of the lesions, the umbilical poke hole is slightly enlarged as the surgical operation incision and the diseased intestinal tube is removed with hidden scars and good cosmetic effect after the operation. good. The laparoscopic technique can be used for both diagnosis and treatment to achieve the purpose of radical treatment, avoiding the blindness of open surgery. There is now a consensus on the advantages of laparoscopic exploratory surgery. Compared with traditional open surgery, laparoscopic exploration has the advantages of less trauma, less bleeding, faster recovery of intestinal peristalsis after surgery, and lower incidence of postoperative intestinal adhesions. For lower gastrointestinal bleeding, laparoscopy can diagnose and treat at the same time, and the postoperative recovery of the child is fast, the hospital stay is short, and the abdominal wall scar is small with cosmetic effect, which is gradually accepted by many parents.