To　improve　the　solution　efficiency　of　structural　crashworthiness　optimization,　adopting　the　Response　Surface　Methodology　(RSM)　to　express　the　structural　crash　response　as　the　explicit　function　of　the　design　variables,　two　kinds　of　optimization　model　is　build.　One　is　that　the　acceleration　of　rigid　body　and　the　invade　distortion　are　separately　fitted　with　elliptical　and　linear　response　surface;　the　other　is　that　both　are　fitted　with　elliptical　response　surface.　With　Ls-dyna　software　as　the　solver　of　structural　crash　analysis,　and　with　Matlab　optimization　toolbox　to　solve　the　optimization　model,　the　program　of　the　structural　crashworthiness　optimization　is　implemented.　The　numerical　examples　show　that　two　kinds　of　optimization　model　based　on　Response　Surface　Methodology　can　efficiently　solve　the　problem　of　the　structural　crashworthiness　optimization.