Abstract: In view of the increasingly severe thermal damage in mine, we introduce and analyze the main measures to cool down the high-temperature in mine. A new type of pneumatic refrigerator is designed. The simulation results show that the refrigerating temperature can reach -18 ℃ and can be controlled automatically and mechanically. The combination of the refrigerator and heat sinking vest is applied to the heat damage in mine; it is safe intrinsically and low in price. The body temperature can be decreased directly; they will not suffer from heatstroke. So this method can ensure the safety in coal production and has wide application prospect.