Electromagnetic　interference　(EMI)　shielding　rubber　composites　with　thermally　insulating　properties　are　necessary　for　some　specific　sealing　fields,　but　their　fabrication　is　challenging　because　it　is　difficult　to　realize　a　balance　between　high　electrical　conductivity　and　low　thermal　conductivity.　Herein,　symmetric　sandwich–like　rubber　composites　composed　of　an　unfoamed　core　sandwiched　by　two　foamed　layers　were　prepared　using　a　layer-by-layer　vulcanization　procedure.　Importantly,　a　segregated　Fe3O4@carbon　nanotube　(Fe3O4@CNT)　network　was　constructed　within　the　entire　composite.　This　structure　improved　the　shielding　effectiveness　(SE)　and　decreased　the　thermal　conductivity　of　Fe3O4@CNT/rubber　composites.　When　the　density　of　the　foamed　layers　was　0.60　g/cm3,　the　thermal　conductivity,　electrical　conductivity,　and　SE　of　the　resultant　composites　were　0.14　W/m　K,　21.5　S/m,　and　40.7　dB,　respectively,　and　their　green　index　(gs)　was　2.13,　implying　that　the　prepared　materials　were　＇green＇　EMI-shielding　composites.　This　study　provides　directions　on　fabricating　EMI　shielding　materials　with　thermally　insulating　performance.　©　2024　Elsevier　Ltd