Objective To analyze and probe into changes of cerebral vascular hemodynamic indexes(CVHI)before stroke,in order to provide references for identifying individuals in high risk of stroke.Methods 200 newly occurred stroke patients,after baseline investigation and CVHI detection,in a cohort during follow up were defined as experimental group.227 stroke patients,in the same population and occurred within one year before baseline investigation,were defined as control group.Differences of CVHI and its accumulative scores were compared between two groups. Results kinematics indexes in experimental group were lower than that in control group.While,dynamic indexes were higher than that in controls at large.A part from Vmin and cp,significant differences of all other indexes were found between two groups.Means of the accumulative score in experimental and control group were 51.32±31.37 and 58. 44+31.63,respectively(P<0.05).Conclusions The study indicates that injury degree of cerebrovascular hemodynamic before stroke is rather than these with stroke history within one year.It seems as an important warning indicator.