High　density　Ba4Sm2Fe2Nb8O30　(BSFN)　multiferroics　ceramics　with　tetragonal　tungsten　bronze　structure　had　been　prepared　by　microwave　sintering　(MS)　for　30min　and　conventional　sintering　(CS)　methods　for　4　h　at　1275　degrees　C.　Single　tungsten　bronze　phase　and　equiaxial　grains　are　obtained　for　the　MS　BSFN　ceramics,　while　a　small　amount　secondary　phase　of　SmNbO4　is　observed　in　the　CS　BSFN　ceramics　with　columnar　grains.　Compared　to　Ba4Sm2Fe2Nb8O30　ceramics　prepared　by　CS　method,　enhanced　dielectric,　ferroelectric　and　magnetic　properties　are　achieved　for　the　MS　BSFN　ceramics.　The　values　of　electric　polarization　Pr　and　coercive　electric　field　Ec　are　2.11　mu　C/cm2　and　7.14　kV/cm　for　the　MS　BSFN　ceramics,　respectively.　Meantime,　the　magnetic　polarization　Mr　of　0.410emu/g　and　coercive　magnetic　field　Hc　of　2930Oe　are　also　obtained　for　the　MS　BSFN　ceramics.　Based　on　the　density,　crystal　structure,　point　defect　and　grain,　the　reasons　of　enhanced　dielectric,　ferroelectric　and　magnetic　properties　are　discussed　for　the　MS　BSFN　ceramics　It　is　indicated　that　Ba4Sm2Fe2Nb8O30　is　an　intrinsic　room　temperature　multiferroic　materials.