Abstract: In order to solve the spontaneous combustion in the places such as coal storage heaps and gangue dump, which causes huge waste and serious pollution to resources and environment, the method of extracting heat from loose high-temperature medium with heat-conducting rod to prevent spontaneous combustion is proposed. The method of optimizing working medium is given, and an experimental system for studying the heat-extracting rate of heat conducting rod is set up. On this basis, the experiment of heat dissipation of the heat-conducting rod is carried out. The results show that the efficiency and the cooling rate of extracting heat from high temperature loose medium are the highest when methanol is used as the heat-conducting rod.