A　theoretical　model　of　the　metal-bulkhead　delay　equipment　with　the　silicon　type　delay　composition　is　established　by　the　STAR-CD　software.　The　numerical　simulation　is　made　to　investigate　the　combustion　wave,　the　heat　transfer　of　shell　and　the　temperature　rise　process　of　ignition　composition　with　the　bulkhead　thicknesses　of　1　mm,　2　mm　and　3　mm.　It　is　assumed　that　the　minimum　value　of　sum　of　the　time　when　the　temperature　of　ignition　charge　rises　to　a　certain　temperature　and　the　ignition　delay　time　is　the　delay　time　of　the　device.　The　temperature　distribution　profile　shows　that　the　temperature　of　the　ignition　composition　gradually　increases　by　the　thermal　conductivity　of　bulkhead　and　is　finally　fired　after　the　burning-out　of　delay　composition,　and　the　center　temperature　of　the　ignition　composition　is　higher　than　that　of　its　edge.　The　delay　time-temperature　curve　can　be　fitted　as　a　6th　order　polynomial.　When　the　thickness　of　a　bulkhead　is　2　mm　or　3　mm,　the　simulation　value　of　the　delay　time　is　3.55　s　or　4.44　s,　and　the　experimental　value　is　2.97　s　or　4.03　s.　Compared　with　the　traditional　pyrotechnic　delay　device,　the　heat　transfer　delay　device　can　effectively　extend　the　delay　time.　©　2015,　China　Ordnance　Society.　All　right　reserved.