Owing　to　their　preeminent　properties,　including　mechanical　flexibility,　thermal　insulation,　and　low　cost,　silicone　foams　are　widely　used　in　industrial　fields.　However,　flame-induced　structural　failure　greatly　restricts　their　practical　applications.　It　is　challenging　for　flexible　silicone　foams　to　realize　reliable　thermal　protection　in　thermo-mechanical-oxidative　environments.　Inspired　by　traditional　pottery,　a　multiscale-filler　synergistic　ceramifiable　strategy　for　creating　silicone　foam　nanocomposites　with　flexibility　and　long-term　fireproofing　is　proposed　herein.　The　foam　materials　not　only　maintain　mechanical　flexibility　and　elasticity　(approximate　to　2%　residual　strain　after　1000　cycles)　at　a　temperature　range　of　-60-210　degrees　C　but　also　exhibit　exceptional　long-term　(＞30　min)　thermal　insulation　upon　exposure　to　approximate　to　1300　degrees　C　oxidative　environments　because　of　their　ability　to　form　a　gradient　robust　porous　ceramic　structure.　Moreover,　the　foam　material　can　provide　stable　thermal　protection　for　electric　cables　and　lithium-ion　battery　packs,　making　it　one　of　the　most　reliable　thermal　insulation　materials　so　far.　This　work　broadens　the　applications　of　silicone　foams　in　emerging　fields　where　mechanical　buffering　and　fireproofing　are　required.