More than 90% of intestinal tuberculosis is caused by human tuberculosis bacilli, in addition, drinking unsterilized dairy products can cause disease due to bovine tuberculosis bacilli, and intestinal tuberculosis infection can be caused by oral and hematogenous spread and the spread of tuberculosis in neighboring organs. The development of tuberculosis is the result of the interaction between the human body and the tuberculosis bacilli, and infection by the above-mentioned means is only a condition for the development of the disease. The disease will develop only when the number of invading tuberculosis bacilli is high and the virulence is high, and when there are abnormalities in the immune function of the human body and the local resistance is weakened by intestinal dysfunction. How are patients with ileal tuberculosis examined? A confirmed diagnosis of intestinal tuberculosis should be confirmed in the presence of Mycobacterium tuberculosis in the intestinal mucosal tissue. Intestinal tuberculosis should be considered if the following conditions are present 1. Young adults with extra-intestinal tuberculosis, especially those with open pulmonary tuberculosis present with GI symptoms, or the systemic manifestations of tuberculosis return after improvement of the original lesion. 2, clinical manifestations include diarrhea, abdominal pain, right lower abdominal pressure pain, but also abdominal masses, intestinal obstruction of unknown origin, accompanied by fever, night sweats and other symptoms of tuberculosis toxemia. 3.Barium X-ray examination reveals signs of irritation, narrowing of the intestinal lumen, shortening and deformation of intestinal segments in the ileocecal region. 4.Tuberculin test is strongly positive. For cases with high suspicion of intestinal tuberculosis, if anti-tuberculosis treatment is effective for 2-6 weeks, a clinical diagnosis of intestinal tuberculosis can be made. If the lesion is in the late ileum and colon, colonoscopy and biopsy can help diagnose and differential diagnosis. For those who have difficulty in diagnosis, mainly proliferative intestinal tuberculosis, sometimes abdominal dissection is required to confirm the diagnosis.