A series of ultra high molecular weight polyethylene(UHMWPE) composites with different relative contents of carbon fiber(CF) and MoS2 were prepared by hot pressing sintering method.The distribution of fillers in the matrix was studied,and the effects of CF and MoS2 on the thermal properties of UHMWPE composites were investigated.The effects of CF and MoS2 on the fretting wear properties of UHMWPE composites were studied by SRV-IV fretting wear testing,and wear mechanism of the composites was explored.The effects of dry friction and deionized water lubrication on the frictional properties of the composites were investigated.The results show that the addition of CF is conducive to the improvement of the thermal properties of composites.Compared with single CF modification,the simultaneous modification of UHMWPE with appropriate amount of CF and MoS2 is more conducive to improving the tribological properties of composites.The UHMWPE composite reinforced with mass fraction of 10% CF and 10% MoS2 can form a uniform and compact transfer film on the friction surface during the friction process,and MoS2 is uniformly distributed in the transfer film,which makes the composite presents the best friction and wear properties.The composite shows a lower friction coefficient in the water-lubricated medium,and the friction coefficient increases with the increase of load.