In　this　work,　WMo　nanopowders　synthesized　by　combined　sol-gel　and　hydrogen　reduction　with　the　mass　fraction　of　10%　have　been　added　into　the　WCu　alloy　to　tailor　the　microstructure　and　properties　of　the　WCu　pseudo-alloy.　The　electrical　properties,　thermal　properties,　tensile　and　arc　erosion　behaviors　of　the　infiltrated　alloys　have　been　systematically　investigated.　The　microstructure,　grain　size　and　phase　constitution,　as　well　as　the　electronic　transfer　of　WMo　solid　solution　were　identified　by　SEM,　XRD,　EBSD　and　DFT　calculation.　The　resulted　WCu　alloy　doped　with　10　wt%WMo　showed　enhanced　tensile　performance　and　highly　improved　arc　dispersion　effect.　The　mechanical　strengthening　and　arc　ablation　mechanisms　originating　from　the　addition　of　WMo　nanopowders　were　also　discussed.　(c)　2021　Elsevier　B.V.　All　rights　reserved.