Purpose:To improve the accurate diagnosis rate for renal angiomyolipoma (RAL) before operation.Methods:Data ofthe imaging and pathological characteristics of 54 cases of patients with renal angiomyolipoma that proved by surgery pathology were analyzed retrospectively.Results:Intravenos pyelography (IVP) did not depict any specific imaging for RAL. Selective renal arteriography (SRA), Ultrasonography(US) and computerized tomography (CT) depicted specific characteristics for RAL. But it was difficult to differ malignant changes from benign ones before surgery.Conclusions:It is widely accepted that the Ultrasonography, Computerized tomography is the best method of imaging examination. When necessary it is helpful to use selective renal arteriography.