The influence of different flow state on the performance of high speed hybrid bearing was discussed by considering the viscositytemperature characteristic of lubrication oils.The Reynolds equation under laminar and turbulence flow,the energy conservation equation,the viscositytemperature characteristics equation of lubrication oils and the corresponding boundary conditions were set up.The performance characteristics of oil film under different operating conditions were obtained by solving these equations with finite difference method and finite element method.The results show that,at a certain speed range,the turbulent area of oil film is increased with the speed rises;the value of oil film characteristic calculated by the mixed flow state model is bigger than that computed by the laminar flow state model,and the difference of two models is increased with the speed rises.Accordingly,the transformation of oil film flow state caused by high speed has a certain impact on the performance of hybrid bearing,and the change of oil film flow state should be taken into account when calculating the characteristic of hybrid bearing,in order to get theoretical value which is close to actual condition.