The work aims to investigate the effects of roughness on hydrodynamic lubrication of textured surface with cross-hatched grooves. Based on JFO boundary conditions and Reynolds equation of average flow model, the theoretical model considering roughness effect was established for hydrodynamic lubrication of textured surface. The multi-grid method was used for numerical solution to obtain the pressure distribution and bearing capacity of oil film, and analyze the influence of roughness on the hydrodynamic lubrication property of textured surface with cross-hatched grooves. The oil film bearing capacity and the influence of surface roughness on the oil film bearing capacity both increased with the increase of groove width. The optimum cross angle, groove depth and spacing contributed to the maximum hydrodynamic lubrication effect of the cross-hatched grooves. The influence of roughness on the hydrodynamic lubrication property of textured surface reached the maximum at the optimum groove depth and increased with the increase of spacing. The bearing capacity of the oil film increased first and then decreased with the increase of the cross angle, while the influence of roughness on the bearing capacity of the oil film increased with the increase of the cross angle. Overlap coefficient of the cross-hatched grooves neither affected the average oil film pressure nor had an impact on the influence of roughness on load capacity. Overall, the surface roughness can restrain the hydrodynamic lubrication performance to some extent and reduce the load capacity of the oil film, so the influence of roughness cannot be ignored when the hydrodynamic lubrication property of textured surfaces with cross-hatched grooves is studied by numerical analysis.