A new type of carbon fiber antiwear filler coated with molybdenum disulfide,CF-MoS2 hybrid was synthesized by one-step hydrothermal method.A series of composites based on polytetrafluoroethylene(PTFE) were prepared by using hybrid fiber with different grafting amount as reinforcement.The crystalline structure,thermal properties and microstructure of the composites were characterized,and their tribological behavior and corresponding wear mechanism were discussed.The results show that compared to the pristine carbon fiber,the prepared hybrid fiber has a larger specific surface area and surface roughness,and compared with traditional binary composite filler composed of lubricating phase and reinforcing phase,it has a stronger interface binding force with the matrix.Due to the synergistic enhancement effect between MoS2 and CF in hybrid,compared with the pure PTFE matrix,the initial decomposition temperature and the fastest decomposition temperature of the composite is increased by 8.4 ℃ and 8.0 ℃ respectively,the tensile strength and fracture elongation is increased by 20.8% and 24.9%,the friction coefficient is decreased by 8.2% and 25.2% at room temperature and 200 ℃,and the wear rate is decreased by two orders of magnitude.