To　improve　the　abrasion　resistance　performance　of　the　critical　tribopairs　within　water　hydraulic　piston　pumps,　tribological　characteristics　of　the　stainless　steel　17-4PH　and　17-4PH　coated　with　Cr3C2-NiCr,　WC-10Co-4Cr,　Cr2O3　and　Al2O3-13%TiO2　sliding　against　carbon　fiber　reinforced　polyetheretherketone　(CF-PEEK)　composite　under　water-lubricated　condition　were　experimentally　studied　using　a　pin-on-ring　test　bench　with　different　working　conditions.　It　has　been　demonstrated　by　the　experimental　results　that　the　tribological　behaviors　of　CF-PEEK/cermet　coatings　tribipairs　were　better　than　that　of　CF-PEEK/17-4PH　tribopair　under　water　lubrication.　However,　the　Cr3C2-NiCr　coating　could　be　damaged　under　high　rotational　speed.　Due　to　the　reaction　film　produced　by　the　Al2O3-13%TiO2　and　water,　the　CF-PEEK/Al2O3-13%TiO2　material　combination　exhibits　more　excellent　tribological　behaviors　than　other　tribopairs　lubricated　with　water,　and　could　preferentially　be　used　in　water　hydraulic　piston　pumps.