In the case of heavy load and low speed,the viscosity of lubricating oil drops due to temperature rise and the cavitation induced by low local pressure seriously affect the lubrication performance such as film pressure and load-carrying capacity.To explore the lubrication performance of low-speed sliding bearing considering the effect of viscosity-temperature and cavitation,a UDF program for the viscosity-temperature equation was formed,the finite element model was established in Fluent and the cavitation effect of Mixture multiphase flow was considered.The lubrication performance of the bearing under different operating conditions was systematically calculated.The effects of eccentricity,shaft speed and viscosity-temperature effect were analyzed and compared.The results show that the maximal pressure,temperature,load-carrying capacity and volume fraction of cavities in the cavity region considering viscous-temperature effect are less than those with constant viscosity.And the increase in shaft speed and eccentricity leads to an enlargement in maximal volume fraction of cavity region.