An　important　auxiliary　method　is　presented　in　order　to　research　the　dynamical　response　and　local　injury　mechanism　caused　by　vehicle　collision　inner　box-section　structure　making　up　a　new　double-decked　continuous-box　girder　highway　bridge　which　has.a　broad　application　prospect.　By　means　of　the　software　LS-DYNA,　a　collision　analysis　model　of　vehicle　and　bridge　is　developed　to　simulate　a　car　oblique　crash　onto　web　bather　inner　box　under　various　cases.　Energy　transfer　in　the　collision　process,　stress　distribution　of　box,　as　well　as　the　influences　of　impact　speed　and　oblique　angle　are　analyzed.　The　time　history　curves　of　collision　force　for　different　cases　are　also　described.　These　are　difficult　to　achieve　in　a　collision　test　inner　box　of　scaled　model　and　observe　on　the　bridge　spot.