Abstract: The heat insulation performance of refuge chamber is an important factor, which affects the rescue effect. In order to improve the heat insulation performance of new mine-used refuge chamber, the original heat insulation structure is improved. Combined with the impact of the flange, heat insulation support and other parts, AutoCAD and ANSYS Workbench are used to carry out co-simulation, the temperature contours and curves of the heat insulation structure is obtained, compared the new refuge chamber with the old one. The simulation results demonstrate the superiority of the heat insulation structure of the new refuge chamber.