Objective:To analyze the clinical characteristics of ischemic colitis(IC) and further improve the diagnosis and treatment of the disease.Methods:The clinical manifestations, risk factors, colonoscopy and abdominal CT examination results of 35 patients with IC confirmed from January 2014 to December 2018 in the Second Hospital of Jilin University were retrospectively analyzed, and their clinical characteristics were summarized.Results:The sudden manifestation of abdominal pain and blood in 31 cases of the 35 patients were the main manifestations.Ten patients who underwent abdominal CT scan showed a thickened bowel wall with a thickness of (7.92±1.41)mm.The CT value of the thickened bowel wall decreased significantly to (21.20±2.27)Hu.In 35 cases of colonoscopy, 42.86%, 31.42%, 20.00%, 2.86% and 2.86% were involved in the descending colon, sigmoid colon, transverse colon, ascending colon and whole colon, respectively.The left colon was the main part, with clusters and bands Mucosa-like erythema, ecchymosis, erosion, and even ulcers.No rectum was involved in 35 patients.Conclusion:The typical manifestation of IC is sudden abdominal pain and bloody stool.Abdominal CT in emergency department has obvious suggestive value for early diagnosis of this disease.Colonoscopy is the main diagnostic method for this disease.