With　the　rapid　development　of　wearable　devices,　a　highly　sensitive　flexible　piezoelectric　sensor　shows　tremendous　potential　for　future　demands.　Here,　we　report　a　novel　lead-free　flexible　piezoelectric　sensor　fabricated　by　a　composite　with　chain-distributed　(Ba0.85Ca0.15)(Ti0.90Zr0.10)O-3　(BCZT)　particles　in　a　polydimethylsiloxane　(PDMS)　matrix.　The　BCZT　particles　were　prepared　by　a　conventional　solid　oxide　process　and　then　dispersed　in　PDMS　oriented　by　the　application　of　a　dielectrophoretic　alignment　field.　The　fabricated　aligned　flexible　composite　with　8　vol%　BCZT　addition　had　a　high　open　circuit　voltage　of　28.8　V　(peak-to-peak),　which　was　nearly　twice　as　high　as　that　of　the　randomly　dispersed　composite.　This　new　mechanically　reinforced　flexible　piezoelectric　composite　was　demonstrated　to　resolve　the　problems　of　the　weak　stress　transfer　to　piezoelectric　elements　and　the　poor　dispersion　of　fillers　in　the　polymer　matrix.　The　8　vol%　BCZT/PDMS　composite　was　incorporated　into　a　flexible　piezoelectric　touch　sensor,　which　possesses　excellent　sensitivity　in　a　wide　pressure　range　and　an　extraordinary　cycling　stability.　These　results　indicate　that　the　fabricated　flexible　piezoelectric　sensor　has　great　potential　in　the　wireless　sensor　network　and　wearable　electronic　fields.