Patients of cerebrovascular disease (CVD) and its causative ailments were examined with a Cerebrovascular Blood-Dynamics Analyzer(CBA,CV-300).Positive rates were between 92.5 to 98.5%.Cerebral pressure (CP) increased in most patients of cerebral hemorrhage, and arterial sclerosis were detected in nearly all of cerebral infarction cases.In Hypertension,abnormalities of cerebrovascular hemodynamics indices (CVDI) were bilateral and symmetrical, and their marked asymmetry was often the omen of stroke. Abnormalities of CVDI were coinsident with focus localyzation by CT in most cases, and they appeared earlier than CT's localyzation, so they have certain value in early stage diagnosis.