The wear performance between Partially Stabilized Zirconia (PSZ) plate and silicon nitride ball under dry conditions was investigated. The wear durability of PSZ with shot peening was higher than that of PSZ without shot peening in the sliding wear test under low Hertzian contact pressure. Due to shot peening, the transformation from tetragonal to monocryclinic phase with compressive residual stress occurred locally on the PSZ surface, and the wear durability on the surface of the PSZ plate was improved.