The　demand　for　high-strength,　flexible,　and　multifunctional　electromagnetic　interference　(EMI)　shielding　materials　has　significantly　increased　in　many　fields.　Herein,　inspired　by　reinforced　concrete　pouring　in　construction,　we　propose　a　＂consolidating＂　method　to　successfully　fabricate　flame-retardant　thermoplastic　polyurethane　(TPU)　reinforced　bacterial　cellulose　(BC)/MXene/modified　silicon　carbide　nanowires　(MSiCnw)　aerogel　composites.　The　obtained　aerogel　composites　have　a　disordered　pore　structure,　in　which　BC/MXene/MSiCnw　is　used　as　the　internal　skeleton,　and　the　tightly　attached　flame　retardant　TPU　sheet　is　used　as　the　protective　layer.　The　assynthesized　aerogel　composites　possess　excellent　mechanical　properties,　withstanding　repeated　compression　and　exhibiting　a　compressive　strength　of　8.86　kPa　which　is　735.8%　higher　than　that　of　BC　aerogel.　At　a　low　MXene　content　(6.17　wt%),　the　aerogel　composite　exhibits　an　EMI　utilization　efficiency　of　1209.08　dB/g　g-1　and　an　average　EMI　shielding　effectiveness　of　up　to　81.6　dB　(K-band).　Furthermore,　the　aerogel　composites　show　excellent　flame　retardant　property　(69.8%　reduction　in　peak　of　heat　release　rate).　More　interestingly,　the　aerogel　composite　displays　satisfactory　thermal　insulation　performances　and　reaches　a　low　thermal　conductivity　of　34.4　mW/m　K-1.　Overall,　the　as-prepared　highly　fire　safe　BC/MXene/MSiCnw/FRTPU　aerogel　composites　show　multifunctional　properties,　making　them　suitable　for　applications　in　electromagnetic　shielding　and　thermal　insulation.