In　this　study,　an　electro-Fenton　gas　diffusion　electrode　featuring　air　self-respiration　was　fabricated　by　incorporating　carbon　nanotubes,　carbon　nitride,　and　polytetrafluoroethylene　onto　graphite　felt.　The　fabrication　process　involved　a　synergistic　approach　of　ultrasonic　impregnation　and　vacuum　filtration,　establishing　a　gas-liquid-solid　tri-phase　interface　both　on　the　surface　and　within　the　electrode.　This　preparation　method　facilitates　autonomous　air　intake,　diffusing　it　to　the　tri-phase　reaction　interface,　thereby　eliminating　the　necessity　for　aeration　and　reducing　operational　costs.　The　optimal　electrode　preparation　conditions　were　determined　through　Box-Behnken　Design　response　surface　experiments,　leading　to　the　enhancement　of　H2O2　production　conditions.　Under　the　optimized　conditions,　H2O2　accumulation　reached　45.83　mg　L-1　cm(-2)h(-1),　surpassing　the　performance　achieved　with　conventional　ultrasonic　impregnation　and　vacuum　filtration　methods.　Furthermore,　the　performance　of　self-breathing　and　the　impact　factors　are　explored.　Finally,　the　electrode＇s　efficacy　was　demonstrated　through　the　degradation　of　phenol　and　bisphenol　A　with　concentrations　of　100　mg　L-1　exhibiting　degradation　rates　of　92　%　and　95　%,　respectively,　within　60　min.