Textured　piezoelectric　composites　(PCs)　based　on　dielectrophoresis　(DEP)　reveal　great　merits　in　both　improving　sensitivity　and　maintaining　flexibility,　thus　trending　to　be　promising　candidates　for　high　sensitive　flexible　sensors.　However,　the　DEP　technique　shows　poor　applicability　in　fabricating　textured　PCs　with　high　filling　content,　which　severely　limits　further　improvement　of　piezoelectric　performance.　Herein,　we　propose　a　new　strategy　to　enhance　DEP　force　by　decorating　Cu　nanoparticles　on　Ba0.85Ca0.15Ti0.9Zr0.1O3　(BCZT)　particles,　thus　textured　BCZT@Cu/PDMS　PCs　with　high　filling　content　are　obtained.　The　results　proved　that　the　enhanced　DEP　force　is　contributed　by　the　excellent　conductivity　and　capability　of　distorted　electric　fields　of　decorated　Cu　nanoparticles.　Consequently,　an　ultrahigh　piezoelectric　voltage　constant　(g(33))　of　720　x　10(-3)　Vm/N　was　achieved,　which　is　much　larger　than　that　in　other　counterparts.　Furthermore,　the　as-prepared　piezoelectric　sensor　exhibits　excellent　sensitivity　and　flexibility,　which　can　fit　vulnerable　joints　like　a　band-aid　seamlessly.　On　this　basis,　a　flexible　sport　health　monitoring　system　was　developed,　which　shows　great　capabilities　in　real-time　warn　of　the　risky　actions,　rectification　of　wrong　postures,　and　sports　injury　prevention.