Effect　of　solution　treatment　temperature　on　microstructure,　mechanical　properties　and　corrosion　resistances　of　2304　duplex　stainless　steel　have　been　investigated　by　means　of　OM,　SEM,　EDS,　universal　testing　machine　and　electrochemical　workstation.　The　results　reveal　that　with　the　increase　of　solution　treatment　temperature　from　1020℃　to　1100℃,　the　amount　of　austenite　in　the　steel　decreases.　The　transformation　rate　of　austenite　to　ferrite　increases　after　solution　treatment,　when　the　temperature　rises　from　1060℃　to　1100℃.　When　the　solution　treatment　temperature　increases　to　1080℃,　the　content　of　Cr　increases　and　the　content　of　Ni　decreases,　the　decrease　of　Ni　content　and　the　passivation　of　the　appearance　enhance　the　tensile　strength　of　the　steel　to　reach　the　maximum　of　590　MPa.　To　further　increase　the　solution　treatment　temperature　to　1100℃,　the　difference　of　chemical　composition　between　two　phases　of　the　steel　is　the　smallest,　and　the　austenite　distribution　will　lead　to　the　decrease　of　tensile　strength.　The　change　trend　of　corrosion　resistance　with　temperature　is　the　same　as　the　tensile　strength.　The　corrosion　current　density　of　the　samples　reaches　the　minimum　of　5.28　μA•cm-2　and　the　charge　transfer　resistance　reaches　the　maximum　of　4.89×105　Ω　when　the　solid　solution　treatment　is　1080℃,　exhibiting　the　best　corrosion　resistance.　©　2019,　Editorial　Office　of　＂Jinshu　Rechuli＂.　All　right　reserved.