Based on the unified Reynolds equation approach,the lubrication model of journal bearing was developed,the effects of different surface textures on lubrication performance were investigated.The simulation results show that distribution of surface texture has a great effect on the eccentricity and film thickness.Appropriate distribution of partial surface texture can improve lubrication performance of bearing.The texture depth greatly affects lubrication performance,and there exists the optimum depth which leads to best lubrication performance.The lubrication performance of rectangular groove is better than others such as rectangular dent,dimple; the lubrication performance of circumferential single column rectangular groove in circumferential direction is better than that of multicolumns rectangular dents; the effect of the surface texture on improving lubrication is more obvious at high speed and light load.