Objective To investigation the rule of TCM syndrome differentiation on vascular dementia,and to guide clinic therapy.Methods The vascular dementia TCM syndrome differentiation scale (SDSVD) was used for TCM syndrome differentiation of 60 cases of vascular dementia.Results The Vascular dementia has such TCM syndromes:deficiency of kidney-essence accounting for 28.3％,turbid phlegm blocking the clear orifices accounting for 23.3％,obstruction of collaterals by blood stasis accounting for 21.7％,liver Yang adverse rising accounting for 10.0％,fire-heat prosperous accounting for 8.3％,metabolic waste in viscera accounting for 8.3％.QI and blood paucity accounting for 3.3％.Conclusion The Vascular dementia has a clear TCM syndrome regularity,the syndromes of deficiency of kidney-essence accounting,turbid phlegm blocking the clear orifices,and obstruction of collaterals by blood stasis are the top three syndromes.