This　study　aimed　to　obtain　super　smooth　surface　medical　implant　laser　power　bed　fusion　Ti6Al4V　samples.　A　self-modified　magnetorheological　polishing　device　and　polishing　fluid　were　used　to　polish　the　laser　power　bed　fusion　additive　shaped　Ti6Al4V　samples　to　study　the　effect　of　the　main　factors　such　as　abrasive　grain　size,　polishing　pressure,　and　polishing　time　on　the　surface　roughness　and　material-removal　efficiency　of　the　samples.　With　continuously　decreased　Al2O3　abrasive-particle　size,　the　surface　roughness　initially　increased　and　then　decreased,　and　the　material-removal　rate　decreased.　The　polishing　result　of　5　μm　Al2O3　was　better,　no　new　scratch　damage　was　found　after　3　μm　Al2O3　polishing;　With　increased　polishing　pressure　from　5　N　to　25　N,　the　deeper　the　abrasive　particles　were　pressed,　the　greater　the　cutting　effect　and　the　more　obvious　the　scratches.　Surface　roughness　initially　decreased　and　then　increased,　and　the　material-removal　rate　increased　from　1.19　nm/min　to　8.68　nm/min.　With　continuously　extended　polishing　time,　the　grinding　and　polishing　effect　continued　to　accumulate,　and　the　surface　quality　significantly　improved,　decreasing　from　366.33　nm　to　19.77　nm.　These　results　showed　that　magnetorheological　polishing　technology　was　very　effective　in　removing　LPBF　forming　defects;　the　surface　roughness　was　reduced　by　96.27%　and　the　additive　defects　can　be　completely　removed.　©