Abstract: In order to improve the heat-insulating capability of the rescue capsule's shell and reduce energy consumption of the cooling system, the heat transfer laws in the rescue capsule under thermal loadings of constant temperature were respectively discussed with numerical analysis method，by selecting two connection types between the inner shell and the outer shell for calculation, which were direct connection type and indirect connection type, and comparing these with the connectionless heat transfer. Effect of heat bridges on heat transfer of the refuge chamber's shell was analyzed. The analysis results showed that the average heat flux through direct connection heat bridge and indirect connection heat bridge had respectively increased by 629% and 27% than that of the connectionless heat transfer. The influencing scope of the former was larger than the latter's. And more heat entered the rescue capsule through the direct connection heat bridge.