In　this　work,　an　innovative　methodology　for　enhancing　the　fire　safety　of　EVA/EPDM　(EE)　composites　by　employing　an　in-situ　encapsulation　technique　to　integrate　magnesium　hydroxide　(MH)　within　the　mesoporous　hydroxystannate　ferrate　(mHSF)　framework　via　ion-driven　self-assembly.　Comprehensive　characterization　involving　X-ray　diffraction,　scanning　electron　microscopy,　and　transmission　electron　microscopy　was　employed　to　investigate　the　structure,　elemental　composition,　and　morphology　of　the　resulting　hybrids.　In　comparison　to　EE/MH　composites,　the　MH@mHSF　hybrids　exhibited　favorable　dispersion　within　the　EE　matrix,　demonstrating　minimal　aggregation.　Upon　incorporation　of　MH@mHSF　hybrids,　a　significant　reduction　in　peak　heat　release　rate　and　total　heat　release　(73.5　and　50%)　compared　with　pristine　EE,　and　an　achievement　in　limiting　oxygen　index　value　of　32.5%　from　19%　for　pristine　EE　was　achieved.　Notably,　when　contrasted　with　the　findings　of　EE/MH/mHSF,　the　EE/MH@mHSF　composite　showcased　superior　tensile　strength　and　enhanced　fire　safety　properties.　This　improvement　can　be　ascribed　to　the　catalytic　charring　behavior　and　adsorption　effects　facilitated　by　well-dispersed　MH@mHSF　hybrids　within　the　polymer　matrix.　Thermogravimetric　analysis/infrared　spectrometry　(TG-IR)　corroborated　a　substantial　reduction　in　organic　volatiles　and　the　suppression　of　carbon　monoxide　emissions　upon　integration　of　MH@mHSF　hybrids,　underscoring　the　alleviation　of　fire　hazards.　The　observed　synergy　of　the　catalytic　and　adsorption　effects　of　mesoporous　HSF,　combined　with　the　flame-retardant　characteristics　of　MH,　plays　a　pivotal　role　in　the　suppression　of　smoke　generation.　©　2024　The　Authors