Abstract: In order to study the thermal conductivity of Heat-regulating circle in the mine, this thesis based on theory of steady state heat conduction, simplified thermal conduction model of Heat-regulating circle and considering the steady state temperature field that it will eventually reach,The thermal conduction process of the Heat-regulating circle was analyzed by thermal conductivity model of the cylinder wall. Considered coefficient of thermal conductivity of rock and roadway surface heat transfer coefficient as a fixed value, the calculation formula of radius and temperature of Heat-regulating circlewas obtained. The formula revealed that the thermal conductivity of Heat-regulating circle was influenced by the thermal conductivity of rock, the surface heat transfer coefficient, the radius of the roadway and the temperature of the original rock, etc.By using measured data and numerical simulation experiments of FLUENT software, the calculation formula of the radius and temperature of the Heat-regulating circle was tested. The results showed that the formula is in accord with thermal conductivity of Heat-regulating circle which is of both theoretical and practical value.