Waste crosslinked polyethylene（XLPE） materials were prepared by mechanical crushing method,XLPE/HDPE composite materials were prepared with torque rheometer,and were processed and formed by micro injection molding machine.Electronic universal testing machine,pendulum impact testing machine and friction and wear testing machine were used to test the tensile property,notched impact strength and friction and wear performance of composite materials.The surface morphology was observed by scanning electron microscope (SEM) and the friction and wear mechanism was analyzed.Results show that with the increase of XLPE filling amount,the tensile properties of the composites decreases slightly,the notched impact strength increases first and then decrease,the specific wear rate first increases,then decreases and then increases,while the friction coefficient has little change.When the mass fraction of XLPE is 6%,the notched impact strength of the composite is increased by 25.6% than that of HDPE material,the specific wear rate is decreased by 10%.Therefore,a small amount of waste XLPE can improve the notched impact properties of the composites,and has little effect on the friction properties of the composites.The main wear mechanism of XLPE/HDPE composite is abrasive wear,if too much waste XLPE is added,fatigue wear will occur.