Catalytic　performance　and　their　stability　of　three　modified　PAN　fiber-Fe　complexes　were　investigated　and　compared,　and　effect　of　irradiation,　Fe　content　and　the　solution　pH　on　their　catalytic　activity　was　also　examined.　The　results　of　three　modified　PAN　fiber-Fe　complexes　indicated　that　catalytic　performance　for　dye　degradation,　and　hydroxylamine　and　hydrazine　mixing　modified　PAN　fiber-Fe　complex　have　the　highest　catalytic　activity.　Irradiation　and　increasing　Fe　content　improves　significantly　their　catalytic　performance.　High　pH　level　reduces　the　catalytic　activity　of　three　modified　PAN　fiber-Fe　complexes,　but　about　60%　dye　are　decomposed　within　90　min　at　pH=8.0　when　hydroxylamine　and　hydrazine　mixing　modified　PAN　fiber-Fe　complex　are　used.　Moreover,　three　modified　PAN　fiber-Fe　complexes　are　reused　for　dye　degradation,　and　their　catalytic　performance　gradually　decreases　with　recycle　number　increasing.