Abstract: Latest researches have demonstrated that micro surface texture can affect the lubrication performance of artificial hip joints.In this paper,a numerical model of artificial hip joints with micro-spherical surface texture was established,taking the Reynolds equation as the theoretical basis.Aiming at a specific example,the effect of surface texture and the variety of its parameters on the lubrication performance of artificial hip joints were analyzed systematically by using the mathematical software MATLAB.Comparing artificial hip joint with smooth surface,artificial hip joints with raised surface texture can improve the loading capacity of the artificial hip joints,while artificial hip joints with sunken surface texture will decrease its loading capapcity.And the larger the size of the raised surface texture is,the better effect it has in lubrication performance.However,the larger the size of the sunken surface texture is,the worse effect it will has.