The invention provides a method of enhancing electromagnetic-pulse equivalent radiation power. A high voltage pulse source is used to charge a plurality of high power electromagnetic pulse sources simultaneously. Under the condition that a complex laser synchronizer does not need to be added, a plurality of high power electromagnetic pulse signals are generated simultaneously. The plurality of high power electromagnetic pulse signals form a power-superposition radiation field in space through radiation of a corresponding antenna. The method possesses the characteristics that the structure is simple; realizability of engineering is strong; cost-effectiveness is high and so on. The method can be used in a common safety field of microwave vehicle stopping, roadside bomb elimination, enemy monitoring system destroying and the like.