Abstract:Idiopathic inflammatory myopathy （IIM） is a heterogeneous group of autoimmune diseases characterized by chronic inflammation of skeletal muscles. In addition to muscle involvement，IIM can affect various organ systems，including the skin，heart， lungs，joints，and gastrointestinal tract（GI）. GI involvement is relatively uncommon，primarily presenting as dysphagia. However，it can extend throughout the GI tract，causing complications such as pseudo- obstruction，ulcers，perforation，and bleeding in severe cases. These severe outcomes significantly impair patients'quality of life and increase mortality，highlighting the need for greater attention and timely management. Different subtypes of IIM demonstrate distinct patterns of organ involvement，with GI manifestations varying based on the specific region affected. This review highlights the clinical features，characteristics，and prognosis of GI involvement in IIM，aiming to provide evidence for enhancing disease management and patient care.