In　this　paper,　the　anisotropic　heat　transfer　property　of　carbon-fiber/epoxy　plain　woven　and　twill　woven　composites　is　studied　experimentally　and　numerically.　In　the　experiment　aspect,　the　steady-state　＇sandwich＇　structure　based　on　the　electric　heating　film　is　used　to　measure　the　out-of-plane　and　in-plane　thermal　conductivity　at　different　temperature.　In　terms　of　simulation,　a　representative　unit　cell　is　established　according　to　observation　of　the　interior　micro-structure　of　composite,　and　then　anisotropic　thermal　conductivity　along　different　principal　axis　can　be　obtained　by　simulating　the　1D　steady-state　heat　transfer　process　within　the　model　in　the　three-dimensional　direction,　respectively.　The　results　show　that　both　the　out-of-plane　and　in-plane　thermal　conductivity　of　carbon-fiber/epoxy　composites　increase　linearly　with　the　hot　surface　temperature　of　composites,　and　the　in-plane　thermal　conductivity　is　approximate　2.8　times　as　high　as　the　out-of-plane　thermal　conductivity.　The　thermal　conductivity　deviation　between　the　plain　woven　and　twill　woven　composites　along　different　main　axis　is　less　than　10%　due　to　the　similar　density.　The　numerical　prediction　result　agrees　with　the　experimental　result　and　the　sources　of　leading　to　the　deviations　are　also　discussed.　©　2021,　Science　Press.　All　right　reserved.