Objective :To explore the relationship of Chinese medicine syndrome factors and changes of intracranial blood flow of hypertension patients, as well as the distribution characteristics of hierarchical syndrome factors of hypertension and its impact on the course of hypertension. Methods: Syndrome elements of 312 cases of hypertensive patients with abnormal results detected by transcranial Doppler ultrasound (TCD) were refi ned, and the correlation analysis was used to study the relationship between the elements syndrome, intracranial blood flow and risk-stratifi cation hypertension patients. Results: There was obvious statistic difference of intracranial blood flow velocity between low-risk group and high-risk group (P