In order to improve the tribological properties of artificial hip joint,the spherical pit microtexture was designed on the surface of the artificial hip joint.The hydrodynamic pressure lubrication model of the microtextured surface was established,and the commercial CFD software ANSYS Fluent was used to analyze the hydrodynamic pressure of the microtextured surface.The average bearing capacity and friction coefficient of the oil film produced during relative sliding of the friction surface were obtained,and the influence of the surface microtextured parameters on the tribological properties was analyzed.The results show that within the given texture parameter range,the average bearing capacity decreases first,then increases and then decreases with the increase of the depthtodiameter ratio,and it increases and then decreases with the increase of the area density.The change trend of friction coefficient with the increase of depthtodiameter ratio and area density is opposite to the average bearing capacity.The optimal parameters of the texture are 0.06 for depthtodiameter ratio and 25% for area density.Therefore,the spherical pit micro texture with appropriate parameters on the surface of the artificial hip joint can improve the average bearing capacity of the oil film and reduce the friction coefficient,so as to reduce the friction and wear of the joint and improve the service life of the artificial joint.