The aim of this technical brief is to provide a numerical approach to investigate the lubricity enhancement effect of micro grooves texture on tools rake face. The key parameters related to cutting condition and grooves morphology were considered in the analytical model of tool-chip friction pair. The fully textured surfaces with the periodic micro-grooves were systematically studied by solving the non-dimensional Reynolds equation with the multi-grid method. The results indicated that the micro-grooves texture generates extra carrying capacity comparing to the flat tool; the optimum grooves direction is vertical to the chip sliding; also, higher area density and optimum grooves width can promote hydrodynamic lubrication. By modifying the tool rake face geometry to restrict the tool-chip slope angle, efficient region of surface texture could be greatly extended. In addition, the film's average pressure was nearly proportional to the chip velocity. Hence, the textured tool is more effective in high-speed cutting.