Abstract: A method of heat storage and temperature control for refuge chamber with phase change energy storage wall is put forward, that is, coupled temperature control method of mine air pressure, phase change cold storage for energy storage wall under conventional condition, and wall phase change heat absorption when mine accident occurs, the diatomaceous earth-based phase change material was used as the energy storage aggregate additive to prepare composite cement mortar, which was then laid on the wall of the refuge chamber to achieve temperature control effect. The test results show that when the amount of energy storage aggregate is 15% and the amount of activated carbon is 6%, the prepared composite cement mortar can be adapted to the energy storage wall structure of the refuge chamber and improve the indoor thermal environment of the refuge chamber.