Objective To investigate the CT characters and corresponding pathological bases of abdominal inflammatory myofibroblastic tumor (IMT). Methods The CT and clinical data of 12 IMT cases confirmed by surgery and pathology were analyzed retrospectively. Results Among 12 cases, 3 cases were found in liver, 1 case in stomach, 1 case in rectum， 3 case in mesentery and peritoneum, and 4 in retroperitoneum. The tumors showed welldefinded round or similar round or irregular in shape. The range of maximum diameter was 2.5 to 17.0 cm. CT presented solid mass in 8 cases, cystic and solid mass in 4 cases. The solid part of all the cases showed hypodense or isodense on non-enhanced CT. The enhancement patterns of 12 cases were various, 6 cases showed heterogeneous moderate enhancement, 2 cases showed homogeneous enhancement, the solid part of 4 cases with cystic and solid tumors showed marked enhancement. Conclusion The CT findings of abdominal IMT show certain common characters like round, similar round or irregular mass with well-definded margin. The enhanced CT of different pathological types can show certain individual characters, which may provide some values for the diagnosis and pathological types.