To investigate the influence of roughness on the textured surface under hydrodynamic lubrication,the hydrodynamic lubrication theoretical model of the textured surface containing sinusoidal roughness was established,and a finite difference algorithm was used to solve the model.The influence of sinusoidal roughness amplitude,wavelength and distribution on film pressure distribution,load capacity and friction coefficient of textured surface was investigated.Numerical analysis results show that the roughness of vertical distribution is better than the roughness of parallel distribution on improving the comprehensive performance of textured surface,which can improve the load capacity of textured surface and reduce the friction coefficient of textured surface.The effects of roughness wavelength and amplitude on hydrodynamic lubrication behavior are closely related to the distribution of roughness and texture depth.