The utility model discloses a heat-insulating capsule body of a mining rescue capsule, belongs to the technical field of capsule bodies, in particular relates to a capsule body of the mining rescue capsule, and aims to solve the technical problems of high temperature non-resistance and large occupation space in the prior art. The utility model adopts the technical scheme that: a heat-insulating part of the heat-insulating capsule body of the mining rescue capsule is arranged between a shell and a liner and comprises a fire stopping layer, an anti-reflecting layer and a heat-insulating layer, wherein the fire stopping layer is arranged on the inner wall of the shell; the anti-reflecting layer is arranged on the inner wall of the liner, contacted with the fire stopping layer and coated outside the heat-insulating layer; the fire stopping layer is made of a heat-insulating material for preventing instant high-temperature heating; and the heat-insulating layer is made of a material with low coefficient of heat conductivity. The heat-insulating capsule body of the mining rescue capsule is mainly used for designing the capsule body of a rescue capsule.