The　accumulation　of　intermediates　is　an　important　reason　for　the　inactivation　of　many　catalysts　including　formaldehyde　(HCHO)　degradation　materials.　Herein,　self-powered　triboelectric　catalysts　(MnOx-PMMA-SSM)　with　a　three-dimensional　nanocomposite　structure　self-assembled　by　nanoflowered　MnOx　inlaid　porous　poly　methyl　methacrylate　(PMMA)　nanofibers　based　on　stainless　steel　mesh　(SSM)　substrate,　is　fabricated　by　electrostatic　spinning　and　hydrolysis　methods.　The　self-powered　triboelectric　catalysts　can　promote　the　generation　of　reactive　oxygen　species　(O*)　under　the　action　of　triboelectric　charges　from　the　friction　between　PMMA　fibers　and　SSM　driven　by　the　wind,　thus　promoting　the　catalytic　oxidation　of　HCHO　and　intermediates.　In　the　15　ppm　HCHO　atmosphere,　the　CO2　production　efficiency　for　the　self-powered　triboelectric　catalysts　can　improve　36.25%　up　to78.93%　compared　with　traditional　MnOx　catalysts,　and　the　catalyst　life　is　as　high　as　72　h　without　evident　decay.　This　research　provides　a　new　strategy　for　high-efficiency,　long-term　and　zero-energy　degradation　HCHO　at　room　temperature.