Abstract: Based on the theory of 3 dimension heat transfer, the influence of heat created by priming decomposing according to the zeroth Arrhenius law on the temperature field in EED was researched. With the finite differential time domain method, the figures of ignition temperature field distribution in EED were obtained, and it showed the ignition point was happened on the interface between the bridgewrie and priming. With the numerical value calculation, the results show that ignition time is extended with E increased, and it is shorten with Z increased.