To study the influence of texture shape on the frictional properties of artificial joint surfaces,the bionic diamond-shaped texture,cylindrical texture and circular texture were designed on the surface of artificial hip joints,and the hydrodynamic pressure lubrication model was established based on Reynolds equation,and the numerical simulation was carried out with ANSYS Fluent software to obtain the average bearing capacity and friction coefficient of the lubricating oil film on the texture surface.The tribological properties of different texture shapes were compared.The results show that within the selected texture parameters and working conditions parameters,the average bearing capacity shows an upward trend with the increase of texture area rate and the increase of sliding speed,and reaches the maximum value when the texture area rate is 25% and the sliding speed is 0.3 m/s.The friction coefficient shows a downward trend with the increase of the texture area rate,and reaches the minimum value at the texture area rate of 25%.The relationship between friction coefficient and sliding speed varies depending on the shape of the texture.The biomimetic diamond texture has the best tribological performance among the three types of micro textures studied.Therefore,the rational choice of texture shape can reduce the wear between the surfaces of the friction pair of artificial hip joints.