Objective: To investigate the value of abdominal CT in diagnosing the severity of pancreatitis. Methods: From Jan. 2016 to Apr. 2018, 92 patients with acute pancreatitis treated in our hospital were retrospectively studied, among them, 38 cases were mild, 34 cases were moderately severe, and 20 cases were severe. All cases were received abdominal CT scan. Results: There were no significant difference in gender, age, and causes of acute pancreatitis among different severity groups(P>0. 05); The Balthazar CT, EPCI, and APACEII scores in severe group were(3. 15±0. 41), (5. 71±0. 66), and(39. 29±8. 22), resp., and were significantly higher than those resp. in mild and moderately severe cases(all P<0. 05); The Balthazar CT, EPCI, and APACEII scores in moderately severe group were(2. 33±0. 30), (4. 36±0. 81) and(29. 02±7. 15), resp., and were significantly higher than those in mild cases(all P<0. 05); The Balthazar CT and EPCI scores were pos. correlated with APACHE II scores(r=0. 510 and 0. 589, P<0. 05). Conclusion: Abdominal CT application is valuable in the diagnosis of the severity of acute pancreatitis.