A transverse ridge or groove perpendicular to the entrainment velocity was set on each surface of ZrO2-Steel contact pair,respectively,and the transient nonNewtonian thermal elastohydrodynamic lubrication (EHL) model was established to analyze the micro-EHL problems numerically.The thermal viscosity wedge effect and micro-EHL phenomenon under highspeed rollingsliding conditions were analyzed,and were compared with the ideal smooth surface results.The results show that a thicker film thickness can be obtained by using zirconia ceramic material with low thermal conductivity as a fast moving surface.The groove or ridge on two solid surface causes a local increase or decrease of the oil film and pressure,while the local variation in the pressure is more serious when using the zirconia as a slow moving surface.The transverse textures will influence the friction coefficient undoubtedly,the values of friction coefficient fluctuates up and down around the value of smooth surface friction coefficient with the motion of solid surfaces.Especially,the values of friction coefficient are decreased significantly when the ridge and groove of the two surfaces are close enough to interact.Therefore,it is suggested to use the materials with low thermal conductivity as the fast moving surface in the engineering design,and select appropriate microtopography to improve the lubrication performance.