To avoid the bad lubrication and wear of ball screw pair in CNC machine tool feed system at high speed, the contact stress of ball screw pair was calculated based on Hertz contact theory and the processing position of texture was determined. The analysis models of ball screw pair with and without texture were established, and the contact stress of ball screw pair was analyzed. The contact stress and lubrication properties of ball screw pairs with and without texture were analyzed using finite element method. The results show that the contact stress of the ball screw pair increases with texture, but the hydrodynamic pressure on both sides of the texture can make the ball screw pair form fluid friction, improving its lubrication performance greatly, thus playing a good friction reduction effect.