Inflammatory bowel disease (IBD) refers to a group of chronic non-specific inflammatory bowel diseases with unclear etiology, mainly including ulcerative colitis (UC) and Crohn's disease (CD), which are characterized by recurrent attacks, persistence and non-healing of lesions. At present, the diagnosis lacks a gold standard and mainly relies on the comprehensive judgment of clinical manifesta-tions, endoscopic findings, pathology and imaging examinations. Compared with general endoscopy, ul-trasound endoscopy (EUS) can clearly define the various layers of the affected intestinal wall and the characteristics of the surrounding mesentery and lymph nodes, based on the observation of the mucosa of the gastrointestinal tract. It is increasingly useful in the diagnosis of IBD and in assessing the activity of the disease. In addition, EUS can also be used for the observation and treatment of combined intesti-nal strictures, fistulas, abdominal and perianal abscesses in patients with IBD. This article reviews the value of EUS in the diagnosis of inflammatory bowel disease.

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