A　paraffin　phase　change　material　absorbed　in　a　composite　material　of　silicon　carbide　nanofibers　and　graphite　fibers　was　prepared　by　vacuum　impregnation　to　solve　problems　of　current　organic　phase　change　materials,　such　as　the　low　thermal　response　rate,　low　thermal　conductivity,　and　high　vulnerability　to　leakage.　A　composite　material　containing　a　phase　change　material　as　the　scaffold　combined　with　silicon　carbide　nanofibers　is　prepared　by　a　simple　vapor-solid　reaction　using　industrially　produced　porous　graphite　felt　as　the　raw　material.　The　thermal　conductivity　of　the　composite　phase　change　material　is　increased　to　1.29　W　m-1　K-1　by　thermal　strengthening　of　the　supporting　scaffold.　Compared　with　the　thermal　conductivity　of　pure　paraffin　of　0.25　W　m-1　K-1,　not　only　is　the　thermal　response　rate　improved,　but　the　composite　phase　change　material　also　exhibits　chemical　stability,　shape　stability,　and　stable　thermal　properties.　The　phase　change　enthalpies　of　the　melting　and　freezing　processes　are　180.5　and　176.4　J　g-1,　respectively.　In　addition,　the　use　of　low-cost　graphite　felt　and　the　simple　synthetic　process　of　the　composite　phase　change　material　facilitates　large-scale　production.　Moreover,　the　composite　is　extremely　flexible　in　terms　of　its　shape　design　and　has　good　energy　storage　properties　in　terms　of　photo-thermal　conversion.　These　features　promise　to　accelerate　the　effective　application　of　the　prepared　composite　phase　change　material　in　solar　and　buildings　energy　storage　with　great　potential　for　application　practices.　©　The　Royal　Society　of　Chemistry.