Integrating　high　flame　retardancy　and　excellent　electromagnetic　interference　(EMI)　shielding　into　polymetric　materials　is　extremely　necessary,　and　well　dispersing　conductive　fillers　into　polymeric　materials　is　still　a　great　challenge　because　of　incompatible　interfacial　polarity　between　polymer　matrix　and　conductive　fillers.　Therefore,　under　the　premise　of　maintaining　integral　conductive　films　in　the　process　of　hot　compression,　constructing　a　novel　EMI　shielding　polymer　nanocomposites　where　conductive　films　closely　adhere　to　polymer　nanocmposites　layers　should　be　a　fascinating　stratety.　In　this　work,　salicylaldehyde-modified　chitosan　decorated　titanium　carbide　nanohybrid　(Ti3C2Tx-SCS)　was　combined　with　piperazine-modified　ammonium　polyphosphate　(PA-APP)　to　fabricate　thermoplastic　polyurethane　(TPU)　nanocomposites,　which　were　used　for　construction　of　hierarchical　nanocomposite　films　by　inserting　reduced　graphene　oxide　(rGO)　films　into　TPU/PA-APP/Ti3C2Tx-SCS　nanocomposite　layers　through　our　self-developed　air　assisted　hot　pressing　technique.　The　total　heat　release,　total　smoke　release　and　total　carbon　monoxide　yield　for　TPU　nanocomposite　containing　4.0　wt%　Ti3C2Tx-SCS　nanohybrid　were　58.0%,　58.4%　and　75.8%　lower　than　those　of　pristine　TPU,　respectively.　Besides,　the　hierarchical　TPU　nanocomposite　film　containing　1.0　wt%　Ti3C2Tx-SCS　presented　an　averaged　EMI　shielding　effectiveness　of　21.3　dB　in　X　band.　This　work　provides　a　promising　strategy　for　fabricating　fire　safe　and　EMI　shielding　polymer　nanocomposites.　©　2023　Elsevier　Inc.