Abstract：Objective：To observe the clinical effect of modified Huangjing Sicao tang for ischemic cerebrovascular disease and its effect on hemodynamics. Methods： A total of 70 cases of patients with ischemic cerebrovascular disease were randomly divided into the study group and the control group according to the envelop method，35 cases in each group. The control group was treated with routine western medicine， and the study group was additionally treated with modified Huangjing Sicao tang based on the treatment of the control group. Both groups were treated for one month. The improvement of Chinese medicine syndrome scores was observed and compared between the two groups. The improvement of indexes of cerebral vascular hemodynamics，including the peak velocity(Vp) of middle cerebral artery(MCA) on the affected side，mean velocity(Vm)，symmetric difference of peak velocity(DVp)，and symmetric difference of mean velocity(DVm) was observed and compared between the two groups. Results：The total effective rate was 88.57% in the observation group，and 68.57% in the control group，the difference being significant(P＜0.05). After treatment，the Chinese medicine syndrome scores of deviated mouth and tongue，linguistic function，hemiplegia，hemianesthesia，dizziness and tinnitus，heat in the palms and soles，thirst and dry throat，and tongue manifestation in the study group were significantly lower than those in the control group； Vp and Vm were significantly higher than those in the control group； DVp and DVm were significantly lower； the difference was significant(P＜0.05). Conclusion：Modified Huangjing Sicao tang can effectively control the clinical symptoms of patients with ischemic cerebrovascular disease，and help achieve a significant recovery of cerebral vascular hemodynamic indexes.