Simulation and friction and wear experiments were used to investigate the effect of groove texture coating on the friction and wear performance of 40Cr surface.In the simulation experiment,a fluid dynamics model of a more realistic unit groove texture was established using the actual cross-sectional morphology of laser processed textures,and the effects of different groove texture parameter combinations on the friction and wear performance of the model were obtained.In the friction and wear experiments,a multifunctional friction and wear testing machine was used to conduct friction and wear tests on coating samples with different groove textures.A high-precision level meter was used to statistically analyze the wear amount before and after the friction and wear test,and a super depth of field microscope was used to analyze the surface area of the wear marks.The relationship between the friction coefficient,wear amount,wear area and the geometric parameters of the texture was explored.The results show that the vertical oil film pressure increases first and then decreases with the increase of groove texture width; in the actual friction and wear experiment,the existence of groove texture and coating greatly improves the friction and wear performance of the 40Cr sample surface.Except for the difference in the wear amount of the width of 150 μm,the rest of the samples all show a trend of decreasing and then increasing friction coefficient,wear amount,and wear scar area as the width and depth of groove texture increase.The simulation results are mutually verified with the test results.