Emission heat protection device

The utility model relates to the technical field of ground heat protection, and provides an emission heat protection device which comprises a ground, a through hole and a flow guide opening, the flow guide opening is formed in the middle of the ground, a heat protection structure is arranged in the ground, and an auxiliary structure is arranged at the top end of the ground. The thermal protection structure comprises a diversion groove, a diversion block, a mounting groove, a connecting pipe, an outlet and a nozzle, the diversion groove is formed in the ground, the outlet is formed in one end of the diversion groove, and the diversion block is arranged in the middle of the diversion groove. The flow guide groove and the flow guide block are used in cooperation, gas flow generated by rocket launching can be guided to flow to the two sides, the gas flow is prevented from impacting the same place of the ground all the time, the connecting pipe and the spray head are used in cooperation, the surface of the interio