The　development　of　wearable　self-powered　systems　faces　the　daunting　challenge　of　balancing　high　energy　output,　mechanical　durability,　and　seamless　integration　with　textiles.　In　this　work,　we　presented　an　innovative　core-shell　composite　fiber　triboelectric　nanogenerator　(CSF-TENG)　fabricated　by　a　scalable　coaxial　wet-spinning　strategy　that　synergistically　integrated　energy　harvesting,　environmental　adaptation,　and　smart　sensing.　This　fiber　consisted　of　a　graphene-bridged　thermoplastic　polyurethane　(TPU)　conductive　core　for　efficient　charge　transfer　and　TiO₂-doped　TPU　triboelectric　shell　for　simultaneously　enhanced　surface　charge　density　and　washability.　CSF-TENG　provided　excellent　output　(open-circuit　voltage　of　130　V,　short-circuit　voltage　of　3.9　μA,　power　density　of　128.9　mW/m2)　meanwhile　maintained　breathability　and　elongation　(＞500　%　strain).　Woven　into　a　fabric　(WCSF-TENG),　the　composite　material　system　functions　as　the　self-powered　human　motion　sensor,　capturing　subtle　physiological　signals,　such　as　respiration　and　joint　movements.　Furthermore,　WCSF-TENG　also　was　used　as　an　encrypted　emergency　communication　platform　for　voice　visualization　and　silent　distress　alerting　via　a　wristband　interface,　on　the　basis　of　Morse　code.　This　work　demonstrated　a　viable　composite　material　strategy　which　could　be　scalable　to　the　next-generation　smart　textiles,　effectively　addressing　the　persistent　trade-offs　among　performance,　durability,　and　large-scale　manufacturability　in　wearable　electronics.　©　2025　Elsevier　B.V.