Indoor　formaldehyde　(HCHO)　pollution　has　more　and　more　serious　adverse　effects　on　human　health,　it　is　urgent　to　develop　a　material　that　can　be　embedded　in　the　air　purifier　to　achieve　HCHO＇s　degradation　efficiently.　In　this　work,　based　on　the　carrier　material　of　polyurethane　foam　(PUF)　modified　by　amino　groups　diethanolamine　(DEA),　we　propose　a　strategy　to　prepare　a　manganese　oxide　compound　catalyst　(DEA-MnOx-PUF).　During　the　static　testing　(C-HCHO:　11.591　ppm,　T:　25　degrees　C),　the　catalyst　shows　higher　HCHO　removal　efficiency　(93.9　%)　than　that　of　unmodified　MnOx-PUF　catalyst　(88.6　%),　and　it　achieves　high　HCHO-to-CO2　conversion　(68.5　%).　Additionally,　during　the　continuous　single-pass　catalysis　testing　(C-HCHO:　11.591　ppm,　T:　25　degrees　C,　240000　mL/(g(cat)h)),　HCHO　removal　efficiency　can　be　maintained　around　at　95　%　within　50　hours.　The　excellent　performance　is　attributed　to　the　continuous　decomposition　of　intermediates　during　the　catalytic　process　by　amino　groups　cross-linked　on　the　surface　of　the　catalyst.　Based　on　the　block　whole　MnOx-based　catalyst　DEA-MnOx-PUF,　this　work　will　provide　a　new　route　to　develop　a　powerful　purifier　material　with　long-term　efficient　removal　of　HCHO.