A pair of pressed combined CL-20-based and JO-8（HMX-based）explosives are selected to investigate the improvements in the explosion driving performance by using more powerful explosive. This paper presents the test results of detonation velocity， detonation pressure and Gurney coefficient from devices loaded by CL-20-based explosive and JO-8， respectively. Enhanced warhead performance has been demonstrated in static experiments of prefabricated fragment warhead and shaped charge. The results show that the fragment velocity （kinetic energy） driven by CL-20-based explosive is 5.1%-7.3% （10.5%-15.1%） higher than that driven by JO-8. The penetration of shaped charge loaded by CL-20-based explosive is 3.2%-12.6% larger than that loaded by JO-8.