In the proportion of energy consumption of the whole society, the proportion of building energy consumption alone reaches 1/3, so for building practitioners, reducing building energy consumption is a very important direction of work. In this study, a new type of hydrated inorganic salt composite material with thermal insulation effect was prepared by utilizing expanded perlite as the support material of disodium hydrogen phosphate dodecahydrate. COMSOL Multiphysics software was used to simulate and analyze the effect of this highperformance composite material on the wall temperature and energy consumption of urban housing buildings in different climate zones. The results show that the inner surface temperatures of the walls of Harbin urban housing buildings applying composite materials and ordinary materials are 24.23℃ and 23.00℃ respectively in January, indicating that the composite materials have a better thermal insulation effect in cold regions. The application of high-performance composites can reduce the annual heating energy consumption in urban housing buildings in Beijing and Harbin from 4980.04kWh and 6026.20kWh to 4123.65kWh and 5526.35kWh. The new hydrated inorganic salt composites prepared in this paper have high engineering value, and they can provide solid material foundation for the development of urban green residential buildings. The new hydrated inorganic salt composites prepared in this paper have high engineering value and can provide a solid material foundation for the development of urban green residential buildings, which can help promote the development concept of “green and energy-saving” in China.
