Abstract: In order to study the effect of surface topography on the frictional characteristics of friction pair under line contact elasto-hydrodynamic condition, by controlling the shape, depth, space and area density of micro texturing, two groups of specimens with the same surface arithmetic average height S_a were designed and manufactured by laser surface texturing. All the surfaces were measured by non-contact 3D optical profiler Talysurf CCI Lite and characterized by ISO25178 and connectivity coefficient. A series of rich oil frictional experiments were conducted on a JPM-1 two-disc tribo-tester and the friction coefficient under different load and different rotational speed conditions were measured. The results show that micro texturing, s shape, direction and depth have significant impacts on frictional characteristics in line contact. Forward arrow texturing showed the best frictional performance and friction coefficient showed a linear growth trend with the increase of the linear speed, and decreased with the increase of load. Three-dimensional characterization parameters of the surface morphology S_sk、S_ku、V_vv、V_vc、U_s had certain relevance with frictional characteristics.