This　work　aims　to　analyze　the　heat　transfer　characteristics　of　a　sandwich　cylindrical　shell　with　a　metal-rubber　core　(SCS-MR)　using　both　finite　element　analysis　and　experimental　techniques.　The　SCS-MR　is　a　lightweight　and　high-temperature　resistant　material　that　is　suitable　for　construction　in　environments　with　varying　conditions,　such　as　rocket　launchers,　aircraft　injectors　and　ships.　The　heat　transfer,　heat　flux,　and　thermal　convection　loss　were　first　analyzed　using　thermal　resistance　and　Fourier　law.　Subsequently,　a　representative　volume　element　of　the　SCS-MR　was　established　to　simulate　thermal　transfer,　followed　by　a　series　of　comparative　experiments　that　measured　the　temperature　gradients,　the　boundary　conditions,　and　the　density　of　the　SCS-MR.　Additionally,　three　types　of　metal　spirals　were　examined　using　differential　scanning　calorimeter　(DSC).　The　convective　thermal　conductivity,　heat　flux,　and　heat　convection　loss　of　the　SCS-MR　were　analyzed　experimentally,　revealing　that　the　metal　spiral　exhibited　an　exothermic　peak　in　the　DSC.　Furthermore,　the　heat　transfer　rate　of　the　SCS-MR　was　faster　than　that　of　the　solid　cylindrical　shell　(CS)　when　the　set　temperature　was　reached.　The　insulation　cover　was　capable　of　providing　boundary　conditions　to　minimize　the　impact　of　natural　convection.　In　the　high-temperature　environment,　the　thermal　conductivity　decreased　with　increasing　density　of　the　scaled　model　SCS-MR.　©　2023　Elsevier　Ltd