Mn-doped　BNT-based　lead-free　piezoelectric　ceramics　were　synthesized　by　traditional　solid-state　sintering　method,　their　microstructures　and　electrical　properties　were　also　characterized　and　studied.The　results　show　that　all　the　experimental　samples　have　pure　perovskite　structure　in　the　range　of　Mn　doping　less　than　0.6wt%.The　ceramics　with　0.30wt%　Mn　doping　exhibite　optimum　properties　the　remanent　polarization　of　Pr　=36　μC/cm2,　the　piezoelectric　constant　of　d33　=174　pC/N,　the　dielectric　constant　of　εr　=9800,　the　dielectric　lose　of　tanδ　=0.04,　the　coercive　field　Ec　=25　kV/cm,　and　with　good　temperature　stability.Component　surface　by　scanning　electron　microscope　(SEM)　sweep　preliminary　of　Mn　doped　accounted　for　distribution　and　the　doping　mechanism　was　studied.　©　2020　Bulletin　of　the　Chinese　Ceramic　Society　Press.　All　rights　reserved.