Abstract: This paper deals with the ion implantation in ZQSn10-2-3 copper alloy and describes how the wear resistance of the alloy is thus improved. N2+ and Ag + N2+ ions are implanted in silver-plated and non-silver-plated copper alloys, respectively. The ion-implanted surface layers are analyzed with a backscattering device, an ion probe and a scanning electron microscope.The results show that the friction factor of the silverplated copper alloy decreases about 40% and the abrasion value reduces by a factor of 2 at a 700m sliding distance after the N2+ implantation. For the non-silver-plated samples, a new alloy,is formed at the ion-implanted surface. Its microhardness increases about 56% and its abrasion value decreases by a factor of 37.5 at a 700m sliding distance. It is also testified that the finish of the sample surface is not affected in the process of ion implantation.