Extracting　energy　from　environment　vibration　by　piezoelectric　effect　to　power　wireless　sensor　nodes　has　been　an　attractive　field　of　research,　and　the　key　challenge　is　to　design　environmentally　friendly　piezoelectric　materials　with　high　power　density.　In　order　to　alleviate　this　issue,　lead-free　Mn-modified　Ba0.9Ca0.1Ti0.93Zr0.07O3　(BCTZ)　ceramics　were　prepared,　and　the　energy　harvesting　characteristics　were　optimized　by　addition　of　Mn　ions.　The　results　showed　that　the　construction　of　R-O-T　phase　boundary　and　uniform　dense　microstructure　boost　the　high　energy　harvesting　characteristics　at　x　=　0.1　specimen.　In　the　mode　of　the　cantilever-type　energy　harvester,　a　high　power　density　of　1.2　W/mm(3)　and　efficiency　of　energy　conversion　of　7%　were　obtained　at　x　=　0.1　specimen　under　an　acceleration　of　1.0　g.　In　addition,　the　BCTZ　energy　harvester　possesses　outstanding　and　stable　performance　after　a　10(6)　cycles,　as　well　as　strong　toughness　against　severe　vibration　environments.