To　solve　the　problems　of　preparation　process,　flexibility,　and　flexibility　of　friction　electric　fibers,　super-elastic　triboelectric　fibers　were　prepared　by　using　an　extrusion-filling　method.　The　liquid　metal　EGaIn　and　thermoplastic　elastomer　material　were　used　as　the　conductive　electrode　and　the　fiber　sleeve,　respectively.　The　fiber　could　sustain　strains　up　to　2　200%　and　exhibited　high　electrical　outputs.　By　using　a　5　cm　long　fiber　as　the　medium,　the　fiber　can　provide　an　unsaturated　average　open　circuit　voltage　of　7　V　when　in　contact　with　paper;　and　the　instantaneous　power　density　of　1.　6　μW　/　m　was　obtained　with　an　external　load　resistance　of　200　M赘.　Weaning　the　fiber　into　an　8　cm　×　8　cm　textile,　the　max　electrical　outputs　were　120　V,　280　nA,　28　nC.　Results　show　that　the　extrusion-filling　technology　is　an　effective　way　to　develop　stretchable　triboelectric　fibers.　The　super-elastic　fibers　in　this　work　have　the　potential　for　multi-functional　wearable　smart　textiles　applications.　©　2025　Beijing　University　of　Technology.　All　rights　reserved.