Four　computer　models　of　conerete　frame　with　staircase　were　made　and　th　seismic-performance　of　the　models　in　elastic-phase　was　calcaulated　by　adopting　base　shear　method,　spectrum　analysis　and　time　history　analysis　based　on　ETABS.　The　results　show　that　including　staircase　into　models　will　change　the　seismic　performance　of　frame　structure　significantly.　The　paper　proposes　that　the　computer　model-4　and　the　response　spectrum　analysis　should　be　used　firstly　in　the　seismic　design　of　conerete　frame　with　staircase.