In order to solve the problem of the sudden spontaneous firing and premature explosion of high temperature in the blast hole charge, a new type of irreversible detonating network applied in the high temperature coal mine was studied by adapting explosion test method, combustion of thermal analysis and system reliability rule.The experiment tests on the heat resistance property of metal detonation cord in high temperature and detonation propagation reliability and resistance effect of the irreversible initiating component were carried out, and the blasting network security and reliability were evaluated and calculated as well.Results show that the metal detonation cord in the hole can effectively improve the safe time of the high temperature resistant performance, and reduce the probability of sudden spontaneous firing.The irreversible detonating structure, similar to the role of the diode in the circuit, plays a safety control function in the blasting network, and avoids the sudden spontaneous firing of the whole detonating network caused by a certain blasthole, ensuring the safety of the main network.The irreversible detonating network reliability reaches 99.99% with the hole number of 64, better than the traditional blasting network.