The patient was an elderly male, because of repeated blood in stool, severe anemia in the local hospital conservative treatment is ineffective (relevant examination did not find bleeding foci), came to our hospital for abdominal arteriography found that small intestinal tumors with tumor hemorrhage, surgical confirmation of small intestinal mesenchymal stromal cell tumor patient surgery went smoothly, postoperative recovery is good. Small intestinal mesenchymal stromal cell tumor is a type of small intestinal tumor with similar clinical manifestations. In recent years, with the application of immunohistochemistry and electron microscopy, gastrointestinal mesenchymal stromal tumors (GIST) have been recognized as a separate class of mesenchymal tumors of the digestive tract, and small intestinal mesenchymal cell tumors have been proposed. Small bowel tumors account for 1% to 5% of gastrointestinal tumors, of which small bowel mesenchymal cell tumors are even more rare. Its diagnosis is still a major clinical problem. Its incidence is mostly seen in the elderly, with a median age of 51-60 years. Most of them are located in the duodenum, upper jejunum and the last section of ileum, while the distal jejunum and the proximal ileum are relatively rare. Small intestinal tumors start with insidious symptoms and vague manifestations, which are often manifested by gastrointestinal hemorrhage, abdominal pain, abdominal mass, and so on, and there are cases of weight loss, emaciation, intermittent abdominal cramps, vomiting, diarrhea, general malaise, and malaise, and sometimes misdiagnosed as functional diseases. Sometimes they are misdiagnosed as functional diseases, and it takes a long time to confirm the diagnosis, sometimes weeks or even years. The lack of specificity in the early diagnosis of small bowel tumors, on the other hand, also indicates that the lack of corresponding examination means is another reason why small bowel tumors are not easy to be diagnosed. Duodenal tumors can often be clarified by barium permeation of the upper gastrointestinal tract and ERCP, while the diagnosis of tumors in the jejunum and ileum is particularly difficult, and the application of small bowel scintigraphy is also very limited. Abdominal arteriography is of great value in gastrointestinal bleeding disorders, especially lower gastrointestinal bleeding. It can be used to stop bleeding by embolization for life-threatening gastrointestinal bleeding, and to mark lower gastrointestinal tumors to facilitate surgical treatment. In this patient, tumor and tumor bleeding were directly detected in the jejunal branch of superior mesenteric artery angiography, and the contrast agent was seen to spill into the lumen of the small intestine.