首先指出经典润滑理论中的边界无滑移条件已不再适用于具有极限剪应力的粘塑性流体润滑．而后，通过确定最大剪应力位置和加入剪应力边界条件，建立了界面滑移后的润滑方程．在联立求解不同区域的润滑方程基础上，对界面滑移的开始位置及扩展方式进行了分析．最后，讨论了不同膜厚比下滑移对润滑性能的影响． First of all, it is pointed out that the boundary non-slip condition in classical lubrication theory is no longer suitable for viscoplastic fluid lubrication with ultimate shear stress. Then, by determining the location of the maximum shear stress and adding the boundary conditions of shear stress, the lubrication equation after interface slip is established. Based on the simultaneous solution of the lubrication equations in different regions, the starting position of the interface slippage and its extension are analyzed. Finally, the effects of slip at different film thickness ratios on lubrication performance are discussed.