A　novel　shape-stabilized　chloride　salt　based　composite　phase　change　material　with　stable　thermal　properties　is　fabricated　and　investigated　in　this　work.　Such　composite　is　consisted　of　a　ternary　chloride　salt　of　NaCl-KCl-MgCl2　as　storage　medium,　an　expanded　vermiculite　as　ceramic　skeleton　and　a　silicon　carbide　as　thermal　conductivity　enhancer.　A　suite　of　characteristics　is　carried　out　to　evaluate　the　composite　thermal　properties　and　stability　as　well　as　heat　transfer　performance.　The　results　show　that　a　stable　physical　interaction　is　observed　among　the　three　ingredients　of　salt　expanded　vermiculite　and　silicon　carbide,　demonstrating　an　excellent　physical　and　chemical　compatibility　achieved　in　the　composite.　Due　to　the　excellent　wettability　between　the　salt　and　expanded　vermiculite,　a　dense　structure　can　be　attained　in　the　composite,　which　could　effectively　eliminate　the　swelling　effect　of　silicon　carbide　and　prevent　the　salt　leakage　over　the　phase　transition　process.　Owning　to　such　a　rigid　structure,　over　70　wt%　of　salt　and　12　wt%　of　silicon　carbide　could　be　accommodated　by　the　expanded　vermiculite,　giving　the　composite　a　melting　temperature　of　377　degrees　C,　a　latent　heat　of　229.3　kJ/kg　and　a　thermal　conductivity　of　1.66　W/m　&　sdot;degrees　C.　Moreover,　the　presence　of　expanded　vermiculite　also　enhances　the　salt　thermal　stability.　Compared　with　the　pure　ternary　chloride　salt　where　a　decomposition　temperature　of　740　degrees　C　is　measured,　the　decomposition　temperature　of　the　composite　is　improved　to　be　800　degrees　C.　The　results　obtained　in　this　work　indicates　the　chloride　salt　based　composite　with　high　thermal　stability　and　splendid　cycling　performance　that　could　be　an　effective　candidate　utilized　in　medium　and　high　temperature　thermal　energy　storage　fields.