With　the　rapid　development　of　the　internet　of　things　(IoTs),　flexible　piezoelectric　energy　harvesters　(FPEHs)　with　excellent　flexibility　and　high　power　generation　capacity　have　attracted　much　attention.　In　this　work,　a　synergistic　design　strategy　of　the　piezoelectric　phase　and　conductive　phase　is　proposed　to　fabricate　xBa(0.85)Ca(0.15)Ti(0.9)Zr(0.1)O(3)/ycarbon　nanotubes/poly(vinylidene　fluoride)　(xBCZT/yCNTs/PVDF)　piezocomposites　(PCs)　with　high　energy　harvesting　performance.　The　increased　polar　beta　phase,　improved　poling　efficiency　and　enhanced　electromechanical　coupling　ability　are　demonstrated　as　the　main　contributors　to　boost　the　power　generation　performance.　The　open　circuit　voltage　(V-OC)　and　short　circuit　current　(I-SC)　of　the　5BCZT/0.1CNTs/PVDF　FPEH　reach　38　V　and　1.1　mu　A　under　1　g　acceleration,　which　is　much　higher　than　those　in　other　counterparts.　Furthermore,　due　to　the　excellent　deformation　response　capacity,　the　FPEHs　are　able　to　harvest　the　mechanical　energy　sourced　from　wind-movement,　showing　great　potential　in　realizing　the　self-supply　of　energy　to　the　wireless　sensor　nodes.