The lubrication effect is directly affected by flowing characteristic of fluid. The viscosity distribution of lubricant is the key point to the bearing. The viscosity variation will directly influence flowing velocity of the lubricants. Apart from temperature rise, the speed change will result in rare faction of the cut in the fluid. In case thin film lubrication, the thickness of fluid film is tiny, relative moving velocity of interparticles is larger in the lubricant, therefore, the variation of lubricant properties will be more prominent. The velocity characteristics of lubricant in micro-clearance are researched with the continuous correcting model of viscosity. The distribution laws of velocity are obtained in the micro-clearance. The data are provided for the study of temperature field and rare faction of the cut under the thin film lubrication.