The invention discloses a unidirectional explosion propagation door element and a method for realizing reliable unidirectional explosion propagation of an explosion network through the unidirectional explosion propagation door element. The unidirectional explosion propagation door element is characterized in that an explosion suppression body in the unidirectional explosion propagation door element can play a role in smooth forward explosion propagation and reverse explosion suppression, and therefore the effect of irreversible detonation is achieved. By means of the unidirectional explosion propagation door element and the method, unidirectional explosion propagation of a detonating cord or a detonating pipe network can be realized, explosion propagation in the explosion network can only be conducted in the designed direction, so that the explosion propagation of the network is unidirectional, namely irreversible, in this way, unsafety, caused by reversible explosion propagation, of the detonating cord or the detonating pipe network can be avoided fundamentally, the safety problem of this type in engineering blasting is solved, and the unidirectional explosion propagation door element and the method have great engineering application prospects.