Wear failure of the slipper pair is a limiting factor for the lifetime of high power density axial piston pumps. Existing studies have revealed the lubrication support characteristics of the oil film through the heat-fluid-solid multi-field coupling model of the slipper pair, but due to the lack of wear calculation at the rupture of the oil film in the model, the prediction of the cumulative wear damage of the slipper pair cannot be realized, which has become a technological bottleneck for the improvement of the performance and the life extension of the axial piston pumps.This paper proposes a texture design methodology aimed at mitigating cumulative wear damage caused by slipper tilting behavior. By extending the conventional thermo-fluid-structure interaction framework to incorporate a solid contact model, the study enables evaluation of the service life degradation curve under cumulative damage across an wide time domain. Simulation results demonstrate that the wavy-textured slipper maintains a stable bimodal pressure field, highlighting that insufficient load-bearing capacity of the bottom surface is a key limiting factor when solid contact is considered. Furthermore, comparative analysis of the oil film and wear characteristics of slipper pairs with different surface profiles reveals that the wavy-textured design significantly improves load-carrying capacity, reduces wear area and wear volume, and thereby enhances overall service life compared to non-textured configurations.