Polyamide 6polyurethane(PA6PU) block copolymers with different molybdenum disulfide(MoS2) proportion were prepared by casting technology.The influence of MoS2 on the properties of friction and wear of the composite,and the influence of sliding speed and load on properties of friction and wear were studied.The worn surface of the composite was investigated by SEM and the wear mechanism was discussed.The results show that the improvement on the friction properties of the composite is not obvious by MoS2 at low load and sliding speed,while the wear rate of the composite is increased dramatically.However,at high load and sliding speed,the stable transfer film is formed in the worn surface of the composite with the increasing of MoS2 content,and the properties of friction and wear of the composite are improved.When the content of MoS2 is low,the wear mechanism of the composite is adhesive wear,with the increasing of MoS2 content,the wear mechanism is change into adhesive wear accompanied by abrasive wear.