The isothermal grease elastohydrodynamic lubrication model of linear contact between infinite roller and plane was established,and the influence of load and entrainment speed on the lubrication film characteristics was studied by using multigrid method under pure rolling condition.The variable load and velocity experiments were carried out on a multifunctional twocolor photo elastohydrodynamic lubrication oil film measuring test bench under corresponding working conditions.The numerical simulation results show that larger load will lead to greater pressure and smaller film thickness,while larger speed mainly advances the secondary pressure peak and increases film thickness.The experimental results show that with the increase of load,the overall film thickness,the minimum film thickness and central film thickness are increased first and then decreased,however,the theoretical simulation values of minimum film thickness and central film thickness are inconsistent with the experimental values when the load is small.This may be caused by the inconsistency of steadystate hypothesis of numerical simulation analysis and the actual rheological properties,timevarying characteristics and lubrication mechanism of grease.With the increase of velocity,the overall film thickness,minimum film thickness and central film thickness are increased linearly,and the experimental values are in good agreement with the theoretical simulation values.