Different　types　of　antibacterial　super　duplex　stainless　steel　materials　were　prepared　by　adding　different　contents　of　Cu　to　UNS　S33207　super　duplex　stainless　steel　and　undergoing　solid　solution　and　antibacterial　aging　treatment.　The　optical　microscope(OM),　scanning　electron　microscope(SEM),　transmission　electron　microscope　(TEM),　coating　method,　ICP-MS　mass　spectrometer,　electrochemical　test　and　other　methods　were　used　to　study　the　effect　of　Cu　content　on　the　organization,　antibacterial　and　corrosion　resistance　of　UNS　S33207　material.　The　results　show　that　the　number　of　precipitated　copper-rich　phases　increases　with　the　increase　of　Cu　content;　when　the　Cu　content　is　less　than　2.55%(mass　fraction),　the　copper-rich　phases　preferentially　precipitate　in　the　ferrite　and　phase　boundaries.　When　the　Cu　content　is　further　increased,　the　copper-rich　phase　will　precipitate　in　the　austenite;　the　size　of　the　copper-rich　phase　precipitated　in　the　ferrite　is　tens　of　nanometers,　and　the　shape　is　spherical　or　ellipsoidal　with　a　stable　FCC　structure,　and　the　matrix　is　a　non-coherent　relationship.　With　the　increase　of　Cu　content,　the　dissolution　rate　of　Cu　ions　increases,　which　results　in　the　increase　of　antibacterial　performance　of　the　material,　and　its　antibacterial　rate　increases　with　the　prolongation　of　the　action　time　with　the　bacterial　liquid.　The　the　copper-rich　phase　is　a　weak　point　in　the　passivation　film.　The　more　its　content,　the　worse　the　corrosion　resistance　of　the　material.　The　Cu　content　should　be　appropriate　to　ensure　the　normal　and　relevant　performance　of　the　material.　©　2022　Central　South　University　of　Technology.　All　rights　reserved.