In　this　study,　series　of　KCl-LiCl　/expanded　graphite　(EG)　composite　phase　change　materials　(CPCM)　with　dif-ferent　EG　contents　for　high　temperature　thermal　energy　utilization　were　prepared　by　melting　impregnation　method.　The　mixture　of　KCl-LiCl　was　served　as　the　phase　change　material　(PCM)　for　thermal　energy　storage,　while　EG　was　acted　as　not　only　the　matrix　to　prevent　the　leakage　of　PCM　but　also　the　heat　transfer　promoter　to　improve　the　thermal　conductivity　of　PCM.　The　microstructures,　phase　transition　properties,　thermal　conductivity　and　thermal　stability　of　different　samples　were　evaluated,　and　the　results　showed　that　KCl-LiCl　was　wrapped　in　the　network　structure　of　EG　without　agglomeration.　The　experimental　latent　heat　of　CPCMs　were　close　to　the　theoretical　value　and　there　was　no　remarkable　variation　in　melting　point.　The　highest　thermal　conductivity　of　CPCMs　was　12.05　W/(m　center　dot　K),　which　is　41.6　times　higher　than　that　of　KCl-LiCl.　Moreover,　the　CPCMs　whose　EG　content　higher　than　20　wt%　showed　good　thermal　stability　after　100　thermal　shock　cycles.　Furthermore,　when　10　wt%　SiC　particles　were　added　into　80KCl-LiCl/20EG,　the　compressive　strength　of　80KCl-LiCl/20EG/10SiC　was　enhanced　to　9　MPa,　which　is　1.8　times　higher　than　that　of　80KCl-LiCl/20EG.