Abstract <p>The reasons for the improved wear resistance of a composite based on polyether ether ketone with a dispersed filler in the form of nanosized copper particles are studied using the molecular dynamics method. Computer simulation of the sliding friction process of polyether ether ketone and its nanocomposite is performed. It is established that in the zone of the simulated tribocontact, the density of polyether ether ketone molecules is 4 times greater than the density of its nanocomposite. Meanwhile, the energy of intermolecular interaction in the shear zone of polyether ether ketone and the metal layer exceeds this indicator during contact of the composite with a counterbody by 35%. It is shown that this dispersed filler stabilizes the kinetic state of the molecules of the polymer material and increases the wear resistance of the composite compared to the matrix.</p>