Intestinal obstruction can be detected by CT, which can not only detect but also know the cause and degree of the disease, providing great clinical help. Intestinal obstruction will usually manifest as vomiting, abdominal pain, stopping exhaustion and defecation. There are many causes of intestinal obstruction, including inflammation, tumor, postoperative adhesions, intra-abdominal hernia, intussusception, intestinal torsion or mesenteric thrombosis, embolism and various other causes. The most commonly used examination methods for intestinal obstruction usually include abdominal plain film. For example, if a patient has acute abdominal pain in the middle of the night, abdominal plain film can be taken first to see if there is intestinal obstruction, which is manifested as multiple dilatation of the intestinal tube with air-fluid planes and a stepped distribution. If further CT examination is done, it can not only clarify the intestinal obstruction, but also clarify the specific cause, whether it is caused by intestinal torsion, intussusception, intra-abdominal hernia or inflammation or tumor, and also determine whether there is any blood supply obstruction, for example, if enhanced examination is done and it is found that there is no blood supply to the intestinal tube, it can be judged that strangulated intestinal obstruction occurs, which needs to be treated in time. Therefore, CT examination can not only detect intestinal obstruction, but also find out the cause and degree, and whether there is any blood supply disorder, which can provide good help to clinical management.