The　numerical　simulation　of　the　dynamic　response　inside　partially-buried　structures　is　studied　out　by　the　LS-DYNA3D　program.　During　the　simulation　of　the　explosive　loads,　there　are　two　methods.　One　is　that　equivalent　pressure　time-histories　inside　explosive　cavity　are　used　to　simulate　the　loads.　The　other　is　that　using　a　piece　of　DYNA3D　material　specifically　designed　for　simulating　high　explosive　detonation　(ALE).　The　results　indicate　that　the　numerical　simulated　precision　of　method　and　the　precision　of　Lagrangian　method　is　very　close.　The　precision　of　the　ALE　method　is　much　higher　than　the　above　mentioned　two　methods,　but　more　computing　time　is　required.　So　the　equivalent　pressure　time-histories　inside　explosive　cavity　method　is　superior　in　practice.