Cerebral vasospasm is one of the complications after subarachnoid hemorrhage,and it is also the important reason for disability and death in patients with subarachnoid hemorrhage.Its pathogenesis remains unclear.At present,there are more studies about vascular endothelial cell function,yon Willebrand factor(vWF) is a specific marker in reflecting vascular endothelial cell function.This article reviews the role of vWF in cerebral vasospasm.