The micro-texture morphology was optimized and improved by changing the processing parameters of the laser marking machine,and the effects of different parameters of surface micro-texture on the tribological properties under poor oil lubrication were studied by using the controllable atmosphere micro-friction and wear tester.The surface micro-texture morphology,wear scar diameter,and wear mark were measured by microcomputer universal tool microscope,and the wear amount of steel ball was calculated.It is found that the morphological quality of the triangular micro-texture on the steel plate is higher than that of the default parameters when the line spacing is 0.01 mm,the opening laser delay time is -91 μs,the closing laser delay time is 114 μs,the end laser delay time is 112 μs,and the corner delay time is 97 μs.The effect order of the five parameters on the surface texture quality from high to low is corner delay time,opening laser delay time,closing laser delay time,line spacing and end laser delay time.Under the condition of the load of 8.82 N,rotating speed of 400 r/min and poor oil lubrication,the parameter combination of triangular texture with the smallest friction coefficient and wear amount is at the depth of 18 μm to 23 μm,the size of 150 μm,the spacing of 250 μm.The anti-wear and friction reduction mechanism of surface micro-texture is the synthetic result of multiple mechanisms,such as fluid dynamic pressure effect,reducing contact area,providing “secondary lubrication” and collecting and storing abrasive particles.