A　new　shape-stabilized　phase　change　material　based　on　polyethylene　glycol　(PEG)　and　surface-modified　layered　double　hydroxides　(LDHs)　was　prepared　by　a　solution　impregnation　method.　PEG　enabled　thermal　energy　storage　and　release　as　a　phase　change　material;　3-aminopropyl　triethoxysilane　(KH550)　was　used　to　modify　the　surface　of　LDHs　(KH-LDHs)　which　then　acted　as　a　carrier　to　keep　the　solid　form　of　the　molten　PEG　at　high　temperature.　The　maximum　weight　percentage　of　PEG　confined　in　the　PEG/KH-LDHs　composite　was　55%.　The　detailed　structures,　thermal　properties　and　UV　absorption　of　the　composite　were　characterized　systematically　by　scanning　electron　microscopy　(SEM),　X-ray　diffraction　(XRD),　Fourier　transform　infrared　(FTIR)　spectroscopy,　differential　scanning　calorimetry　(DSC),　thermal　gravimetric　(TG)　analysis　and　UV-vis　absorption　spectra.　Results　show　that　the　PEG/KH-LDH　composite　has　a　suitable　phase　change　temperature,　considerable　enthalpy,　and　good　thermal　stability　as　well　as　remarkable　ultraviolet　absorption　ability.　As　a　new　shape-stabilized　phase　change　material,　the　PEG/KH-LDH　composite　is　expected　to　contribute　to　the　effort　of　searching　effective　measures　for　thermal　management　of　building　and　pavement　materials.　©　2019　The　Royal　Society　of　Chemistry.