A　systematic　study　on　the　densification　behavior　and　build　quality　of　2205　duplex　stainless　steel　fabricated　using　laser　powder　bed　fusion　(LPBF)　was　performed　by　experiment　and　simulation,　aiming　to　offer　some　supplementary　work　for　research　on　additive　manufacturing　(AM)　of　duplex　stainless　steel.　In　this　study,　samples　with　differing　laser　powers　were　prepared,　and　a　highest　relative　density　of　98.87%　was　obtained.　Then,　the　pore　defects　and　surface　morphologies　were　investigated　to　unveil　densification　behaviors　during　a　building　process.　The　relationship　between　surface　morphologies　and　the　formation　of　pores　was　discussed.　It　reveals　that　the　inter-layer　printing　on　these　surface　defects　caused　by　unreasonable　laser　power　could　increase　the　possibility　of　inside　pore　defects　and　reduce　the　density　of　specimens.　Particularly,　the　big　spatters　could　be　the　cause　of　lack-of-fusion　defects　even　under　sufficient　power　input.　Therefore,　adequate　intra-　and　inter-layer　bonding　under　reasonable　processing　parameters　is　crucial　for　densification.　The　mechanical　properties　of　the　specimens　prepared　with　the　laser　power　of　260　W　are　the　highest,　and　the　yield　strength,　tensile　strength,　and　elongation　are　798.68　MPa,　953.63　MPa,　and　10.85%,　respectively.