Piezoceramics　with　a　high　depolarization　temperature　(T-d)　and　excellent　piezoelectricity　are　ideal　materials　for　constructing　advanced　high-temperature　piezoelectric　energy　harvesters　(HT-PEHs).　Herein,　the　Bi(Zn1/2Ti1/2)O-3　(BZT)　unit　with　a　large　tetragonality　was　added　into　the　BiScO3-PbTiO3　(BS-PT)　high-temperature　piezoelectric　matrix　under　the　guidance　of　morphotropic　phase　boundary　(MPB)　manipulation　and　a　lattice　distortion　modulation　strategy.　Based　on　the　dual　effects　of　linear　expansion　of　MPB　and　the　enhancement　of　lattice　tetragonality,　the　perovskite-type　0.36BS-0.62PT-0.02BZT　MPB　composition　shows　a　T-d　of　up　to　418　degrees　C　and　a　large　high-temperature　piezoelectric　constant　(d(33))　of　932　pC　N-1.　The　above　comprehensive　high-temperature　characteristics　are　far　superior　to　those　of　most　reported　perovskite　piezoceramics.　Moreover,　the　HT-PEH　assembled　using　the　0.36BS-0.62PT-0.02BZT　MPB　ceramic　exhibits　excellent　output　power　density　of　80　mu　W　cm(-3)　and　ability　to　drive　microelectronic　devices　even　at　400　degrees　C.　This　work　demonstrates　that　the　BS-PT-BZT　material　is　a　promising　candidate　for　high-temperature　piezoelectric　energy　harvesting　applications.