The utility model discloses a dry powder extinguishing agent relief valve structure for a dry powder extinguishing agent storage tank of an explosion suppression device, belonging to coal mining safety facilities. The dry powder extinguishing agent relief valve structure comprises a tank body, a valve body, a valve cover, a valve, a valve opening mechanism and a detonation pipe, wherein one end of the tank body is provided with a tank body interface in an extending manner, while the other end of the tank body is blocked by a plug; one end of the valve body is formed into a narrow shrunk connection base; a powder injection connector hole is formed in the wall body of the valve body; a powder introducing pipe connector is formed on the connector hole; a fire extinguishing medium pouring passageway is arranged on the valve body; the passageway is internally provided with a passageway starting valve; the bottom wall of the valve cover is provided with a sealed cap nut matching hole; a sealed cap nut is arranged on the matching hole; the center of the cap nut is provided with a detonation pipe control line demising hole; the center of the valve is provided with a valve hood; one side of the fragile wall of the valve hood is provided with an easily-breaking tank; the valve opening mechanism is arranged in a valve cavity; the detonation pipe is arranged on the valve opening mechanism. The dry powder extinguishing agent relief valve structure provided by the utility model can ensure the chargeable capacity of a dry powder extinguishing agent, ensure an explosion suppression effect, ensure the smooth powder outlet passageway, improve the continuous flow irrigation efficiency of a fire extinguishing medium, and give play to multichannel advantages.