Based on the Φ100mm caliber molding charge, analyzed the influence of the stern structure of the molding charge on the matching by the two-molded damage elements of the explosive forming projectile (EFP) and the jetting penetrator charge (JPC), and realized the optimal design of the molding charge stern structure of the two-molded combat unit. According on the research foundation of the two-mode combat-molding charge, based on the determination of five basic structural parameters, studied the change of stern structure and its damage forming rule. By using AUTODYN software to simulate the molding charge of different stern structures, the molding parameters and morphology of the two types of damage elements are obtained. The influence law of stern structure on two-mode damage elements and the optimization value of stern structure were obtained by comparison and analysis, which provided reference for the design of stern structure of large cone-angle shaped charge in two-mode warhead.