Objective To investigate the value of CT、MR imaging in diagnosis of solitary fibrous tumors (SFT). Methods The CT and MRI findings of 7 cases of pelvic SFT confirmed by surgery and pathology were retrospectively analyzed，And compared with histopathological results. Results Among the 7 cases of pelvic SFT，all were single lesions，of which 5 cases were roundshaped，1 case was oval，and 1 case was irregular，all of which were large in size. Most of the tumors were solid，located in the pelvic extraperitoneal space and the presacral area；On CT plain scan，7 cases of tumors were uniform/mixed，and 2 cases were combined with cystic degeneration and necrosis. The enhanced CT scans showed obvious uniform or uneven enhancement，showing maplike and continuous enhancement，and tumor blood vessels were visible. On plain MRI scan，5 patients T1WI showed slightly low signal，T2WI showed a mixed signal dominated by high signal. The enhanced scan showed obvious uneven enhancement，and tumor blood vessel emptying effect was seen in all tumors；Among the 7 cases of pelvic SFT，5 cases were benign and 2 cases were malignant. The tumor surface and intratumoral blood vessels were abundant，and immunohistochemistry was positive for CD34，CD99，CD117，Vimtin，Bcl2 and Ki67. Conclusion The CT and MRI manifestations of pelvic SFT have certain characteristics，which can make correct diagnosis for most cases and reduce misdiagnosis.