Methyl　palmitate　(MP)　is　a　promising　phase　change　energy　storage　material.　It　features　high　latent　heat,　suitable　phase　change　temperature,　low　degree　of　supercooling　and　so　on.　However,　like　other　organic　phase　change　materials,　the　common　problem　of　lower　thermal　conductivity　makes　it　unable　to　perform　better　in　energy　storage.　Expanded　graphite　(EG)　has　been　proven　to　be　high-efficiency　for　enhancing　the　thermal　conductivity　of　organic　phase　change　materials.　MP/EG　phase　change　composite　was　prepared　and　characterized　in　this　research,　and　the　heat　transfer　performance　was　numerical　simulated　by　finite　element　analysis　software　ABAQUS.　Results　show　that　MP　can　be　absorbed　into　the　layered　pores　of　EG,　and　the　stable　absorption　ratio　is　77%.　Numerical　simulation　results　reveal　that　EG　can　significantly　enhance　the　heat　transfer　performance　of　MP.　Moreover,　EG　can　decrease　the　system　temperature　gradient　during　phase　change　process　that　makes　the　heat　transfer　and　temperature　distribution　more　uniform.