Objective To discuss the Diagnostic Value of MRI in cerebrovascular disease .Methods The brain MRA and MRI of 2000 outpatients in our hospital were reviewed retrospectively, the types and Incidence of cerebrovascular disease detected by 1.5T MR were analyzed. Results In the 2000 cases,we found 106 cases of vascular disease the rate of incidence 5.3%, which includes 53 cases 78 vessels with artery stenosis, 23 cases 27 lesions with aneurysm , 4 cases with moyamoya disease,7 cases with AVM, 4 cases with venous malformation, 14 cases with cavernous hemangioma, and 1 case with capillary expansion. MRA examination has high value in evaluating the region and degree of arterial stenosis, the shape and location of aneurysm,and the number of affe cted vessels of moyamoya disease.MRA and the SWI sequence is preferred in showing the supply artery, draining vein and vascular nest of AVM,and displaying the vascular structure,the number and direction of draining vein of venous malformations.T1WI,T2WI,SWAN sequence has higher value while MRA is of little value in diagnosis of cavernous hemangioma. Conclusion MRA combined with MRI can clearly show the location,size,shape,number and type of cerebrovascular disease,and has important clinical value in early diagnosis and intervention.