In order to improve the interface and tribological properties of Nomex/PTFE hybrid fabric reinforced composite,the ozone oxidation was chosen to modify the surface of Nomex fiber and PTFE fiber.Effect of ozone treatment time on the morphologic and functional groups of Nomex and PTFE fiber were measured by scanning electron microscopy (SEM),energy-dispersive X-ray spectroscopy (EDS) and contact angle tester.The tribological properties of Nomex/PTFE hybrid fabric reinforced composite were evaluated by multi-specimen test machine and the worn surface of specimen and contact-pin were characterized by SEM and EDS.The test results indicate that the surface morphology of Nomex and PTFE fiber composite,the hydrophilicity of the fiber and the adhesion with the resin are significantly improved by ozone oxidation.However,the mechanical property of Nomex and PTFE fiber is reduced.The interface and tribological properties of the composite are improved after ozone oxidation and the optimal treatment time is 1 h.The wear rate is reduced by 16.7% to 20%.The ozone oxidation increases the surface roughness and the oxygen-containing functional group content of Nomex and PTFE fiber,which is beneficial to enhance the interfacial adhesion between fiber and resin,and reduce the stress concentration effect of the applied load on the fiber resin interface.