Aim and Methods The change of cerebrovascular hemodynamic index(CVDI)and Doppler expression of 26 patients with cerebrovascular atherogenesis using the surveying instrument of cerebrovascular hemodynamics were studied. Results ①In most of the patients two sides of total cerebral blood flow and the velocity didn't decrease,the cerebrovascular resistance,elasticity and cvitical pressure increased.The function of cerebrovascular regulation deteriorated.②The Trans-Link Doppler found: the blood flow and the velocity of anterior cerebrovascular artery,middle cerebrovascular artery were in normal range.Cerebral vascualr atherogenesis index especially the(Pulstility P1) increased.③The CVDI had remarkable changes in the lesion side of brain hemisphere,especially the total cerebral blood flow and the velocity decreased. Conclusion The cerebrovascular resistance and the function of cerebrovascular regulation are more serious than that of cerebrovascular atherogenesis.