Abstract: Objective To study the clinical and imaging features of Ulcerative Colitis(UC).Methods The clinical,imagins,colonoscopy and pathological data of 35 cases of UC were studied retrospectively.Resuits 35 cases' lesions were located at the left colon,12 cage6 of mucosal thickening disorder,9 cases of"double taxation",13 cases of intestinal deformed,16 cases of inflammatory polyps.Conclusion Combination of clinical,X-ray air-barium double contrast radiography and endoscopy,UC can be diagnosed.