The　Ag-bearing　antibacterial　stainless　steel　has　attracted　substantial　attention　in　the　field　of　bacterial　proliferation　prevention.　In　this　study,　a　Cu–Ag　alloy　was　incorporated　into　a　CD4MCu　duplex　stainless　steel　(DSS)　to　produce　a　good　antibacterial　property.　The　Ag-bearing　CD4MCu　duplex　stainless　steel　samples　were　conducted　solid　solution　treatment　at　various　temperatures.　The　effects　of　the　solid　solution　temperature　on　the　microstructure,　mechanical　and　corrosion　properties,　as　well　as　silver　ion　release　characteristics　and　antibacterial　properties　were　investigated.　Results　show　that　apart　from　the　original　α,　ϒ　phases,　Ag-bearing　phases　were　formed　in　all　samples　after　solid　solution　at　different　temperatures.　The　volume　fraction　of　ϒ　and　Ag-bearing　phases　decrease　with　increasing　solution　temperature.　The　tensile　strength,　hardness,　elongation,　and　corrosion　resistance　first　decrease　and　then　increase　along　with　the　increase　in　the　solid　solution　temperature.　The　heat　treatment　conducted　at　1150C　increases　the　strength,　the　hardness,　the　pitting　corrosion　resistance,　and　the　antimicrobial　capability　simultaneously.　The　antibacterial　rates　of　all　the　Ag-bearing　CD4MCu　duplex　stainless　steel　samples　after　solid　solution　treatment　are　above　99%,　indicating　their　good　anti-bacterial　capabilities.　©　2019　by　American　Scientific　Publishers.　All　rights　reserved.