Abstract: For the frequent underground accidents that often endangers life safety of underground personnel, it studies the key technologies of the living environment of coal mine refuge chamber, forms the basic design of a refuge chamber environment, and the design provides the basic living condition that is more than 96 hours for workers in the coal mine refuge chamber. It proposes the method of air purification, including the use of absorbent to absorb carbon dioxide, oxidation treatment of carbon monoxide, and calculates the corresponding amount of chemical agent. It uses the actively absorbing water technology and low saturated vapor pressure controlling water technology to absorb water elements in the air, and chooses phase transition module to realize the refuge space cooling. It designs a closed protection system, which can isolate the outside of the poisonous and harmful gas, and has the ability to resist 0.3 MPa shock wave.