Abstract: To solve the plunger-wear problem at the hydraulic end of horizontal pumps caused by the low viscosity and poor lubricity of water, this paper establishes a CFD lubrication simulation model for surfaces with staggered textures, and investigates the effect of texture parameters on lubricating-film performance. The influences of stagger angle, texture radius and texture depth on the lubrication characteristics of the lubricating film are explored by analyzing the variation laws of static pressure, load-carrying capacity and friction coefficient on the textured surface within a single cycle. The results show that the influencing order of texture parameters on lubrication performance is: texture radius ＞ stagger angle ＞ texture depth. Compared with uniformly-arranged textures, the texture with a stagger angle of 40° increases the load-carrying capacity of the lubricating film by 52.2 % and reduces the friction coefficient by 34.4 %.