In order to improve the combat capability of tank gun fragmentation bomb, the long tube electric primer for programmable fuze fragmentation bomb was designed. Aiming at the performance indexes such as antistatic performance, electrifying safety and firing reliability, the structure design is carried out to solve the problems such as the smoke leakage tightness of the electric primer, the strength of the ring electrode, the welding quality of the bridge wire of the firing piece, the firing reliability and the like. The results show that the scheme can ensure the effective implementation of the long tube electric primer to the setting and firing voltage of the explosive bomb, and meet the requirements of the gun firing instructions.