To address the issues of insufficient lubrication retention capacity and wear resistance of polycarbonate-polyurethane(PCU) artificial meniscus, this study utilized the fused deposition modeling(FDM) process to fabricate PCU specimens with periodic grid-like blind hole structures. The key size parameters such as the width and depth of the microholes were systematically controlled. Through wetting tests and repetitive friction experiments simulating the joint environment, the influence laws of microstructure geometric features on the surface lubrication behavior, lubricant retention characteristics, and friction and wear mechanisms of the specimens were systematically explored. The results show that increasing the depth of the microholes can enhance the lubricant storage capacity, but excessive depth would lead to a decrease in the penetration rate of the lubricant and a weakening of the bearing capacity of the hole wall structure. Increasing the width of the microholes can effectively promote the penetration of the lubricant, expand the coverage area of the liquid film, and thereby improve the interface lubrication effect. Reasonably matching the depth and width parameters of the microholes can ensure the storage capacity of the lubricant while achieving timely replenishment of the lubricant, significantly reducing the friction coefficient and alleviating the wear degree. Among them, the parameter combination of hole depth of 1.0 mm and hole width of 0.6~0.8 mm can achieve a dynamic balance between lubricant storage and replenishment, and achieve the optimal matching among the storage capacity, supply efficiency and structural integrity. This research provides a reliable experimental basis and theoretical reference for the surface functionalization design and improvement of the frictional properties of PCU artificial meniscus.