By using Hopkinson principle and impact sensitivity test method,an impact safety experiment was designed for studying the impact security diversity between PBX-based RDX and PBX-based reduced insensitive RDX（D-RDX） explosive,which can determine the dynamic change process and the impact sensitivity of explosive sample in the higher impact velocity. Results show that the impact safety of PBX-based RDX and PBX-based D-RDX explosive,the reflecting amplitude and pulse width after impact loading are quite different. The result of LS-DYNA numerical simulation are basically consistent with experimental results.