Thepaperanalysesredoxreactionsofan-tioxidantsSiandSiCeteatdifferentpositionsinthecourseofoxidationofcarbon-containingmaterials,Itispointedoutthatredoxreactionofantioxidantsinoxidized-zoneplaysaveryimportantpartinantioxidationofcarbon-con-tainingmaterials,ThereasonwhySiCcanmakecarbon-containingmaterialantioxideatthermodynamictemperaturehasbeenex-plained,Experimentprovesthatantioxidantsinoxidizedzonecanmakecarbon-containingmaterilsantioxidize.