The interrelated effect of seawater permeation and high pressure in the deep sea typically results in interfacial debonding and lubrication failure of carbon fiber-reinforced polymer composites (CFRPCs) designed for wear components. We propose a vacuum filtration strategy to construct a strong-robust hybrid interfacial architecture on the carbon fabric surface composed of polyetherimide (PEI) as the soft phase and nanodiamond (ND)/MXene as the hard phase. The strong-robust interface enhances the interface adhesion between the carbon fabric and polyetheretherketone (PEEK) resin, alleviating stress concentration and crack propagation and thereby promoting seawater pressure resistance. The developed composite exhibited 28.5 % greater interlaminar shear strength, and the tensile strength improved by 34.9 %. In a simulated deep-sea environment with an ocean depth of 1000 m, the wear rate and seawater absorption values of the developed composite were 38 % and 72 % lower, respectively, then those of the pristine CF/PEEK composite. This study presents experimental results for designing polymer composites with high mechanical properties, lubricating performance and seawater pressure resistance for sliding components in deep-sea applications such as bearings, valves, gears and shaft sleeves