Silica coated Glauber’s salt-based microcapsuled phase change materials were prepared by emulsion polymerization, using Tetraethoxysilane (TEOS) and 3-aminopropyltriethoxysilane (APTES) as the silicon source, Glauber’s salt-based microcapsuled phase change materials as core materials. The melting and solidifying enthalpy of the microcapsules are measured as 136.4 J/g and 76.9 J/g, respectively, with associated temperatures of 23.6 ℃ and 17.6 ℃. The core-shell structure of the microcapsules reduces the degree of solid-liquid separation of inorganic hydrated salts and suppresses the occurrence of phase stratification. After 100 cycles, the enthalpy of melting is 64.3 J/g, which has good cycle stability and can be used in fields such as thermal energy storage.