2205　duplex　stainless　steels　containing　0.07%　and　0.01%　Ag　were　respectively　prepared　by　adding　Cu-Ag　alloy　particles.　Meanwhile,　the　base　material　2205　and　Cu-bearing　2205　were　prepared　for　comparison　with　Ag-bearing　2205.　The　microstructure,　mechanical　properties,　corrosion　resistance　and　antibacterial　properties　of　the　four　materials　were　investigated　by　Optical　Microscope(OM),　Scanning　Electron　Microscope(SEM),　tensile　test,　electrochemical　workstation　and　film　mulching　method.　Results　reveale　that　the　increase　of　Ag　content　increases　the　amount　of　α　phase　and　decreases　the　amount　of　γ　phase　in　the　microstructure.　Ag-containing　phases　exist　in　both　Ag-containing　materials.　Ag-phases　with　particle　sizes　ranging　from　1　to　6　μm　are　distributed　at　the　interface　of　α　matrix　and　in　α/γ　phase,　while　Ag-phases　with　particle　sizes　ranging　from　80　to　400　nm　are　distributed　in　γ　phase.　Compared　with　base　material　2205,　adding　of　Cu　can　improve　the　tensile　strength　of　the　materials,　but　decrease　its　elongation.　The　tensile　strength　and　elongation　of　the　materials　both　increase　with　the　Ag　content.　The　material　containing　0.1%　Ag　exhibits　the　best　comprehensive　mechanical　properties.　In　3.5%　NaCl　medium,　Cu-bearing　2205　exhibits　the　best　corrosion　resistance.　With　the　increase　in　Ag　content,　the　stability　and　corrosion　resistance　of　passivation　film　first　increases　and　then　decreases.　The　antibacterial　rate　of　Ag-bearing　2205　materials　increases　with　the　contact　time.　The　high　Ag-bearing　materials　exhibit　a　good　antibacterial　property,　and　the　base　material　2205　and　Cu-bearing　2205　do　not　have　antibacterial　properties.　©　2020,　Jilin　University　Press.　All　right　reserved.