Abstract: The thermal properties include freezing point, melting point,the heat of fusion and thermal stability during the phase change process are investigated. In the analysis, the Differential Scanning Calorimenter（DSC） was used to determine the heat of fusion of the cool storage materials. The temperature sensor was used to determine the freezing point and melting point of the cool storage materials. The new cool storage material was found by thermal analysis. The results show that the cool storage material can be considered as an efficient cool storage material for cool storage air conditioning system.