Objective:To study CT and MRI radiological expression of benign and malignant meningiomas to provide a reliable evidence for clinical surgery scheme determination. Methods: The radiological and pathological data of 40 cases with meningiomas undergoing surgery in hospital were analyzed, and the benign and malignant lesions of meningiomas were judged according to imaging features such as meningioma shape, edge, signal or density, peritumorous edema, intratumorous calcification, multiple tumors, tumor brain interface status etc.Results: (1)Tumor signal or density: T1 signal inhomogeneous in 6 cases(15.0%), T2 signal inhomogeneous in 8 cases(20.0%), the signal homogeneous in 26 cases (65.0%), CT density is inhomogeneous in 15 cases(37.5%), CT density is homogeneous in 25 cases(62.5%); (2)Tumor edge: regular in 27 cases(67.5%), coarse, irregular, lobulated, with mural nodules in 13 cases(32.5%); (3)Dural tail sign in 36 cases (90.0%); (4)Skull invasion in 6 cases(15.0%); (5)Calcification within the tumor in 7 cases(17.5%); (6)Peritumoral edema in 14 cases(35.0%); (7)Multiple tumors in 6 cases(15.0%); (8)Enhance performance: Obvious homogeneous enhancement in 27 cases(67.5%), Obvious inhomogeneous enhancement in 13 cases(32.5%).Conclusion: Benign and malignant meningiomas with a certain radiological feature, the curative effect and prognosis may be properly evaluated by the radiological expression of meningiomas.