The　dynamic　model　for　tall　shear-wall　building　was　presented　by　continuous-discrete　method　and　the　frequency　equation　of　tall　shear-wall　building　was　obtained　by　the　vibration　theory　of　system　with　distributed　parameters　and　introducing　the　boundary　conditions　of　concentrated　parameters,　then　frequency　and　mode　shape　were　obtained　by　the　numerical　method.　On　the　basis　of　the　Betti　law,　the　orthogonal　conditions　of　modes　of　tall　shear-wall　building　with　concentrated　and　distributed　parameters　were　deduced.　Founding　the　motion　equations　of　shear　wall　in　each　story　and　concentrated　mass　of　each　story　under　earthquake,　the　motion　equations　of　tall　shear-wall　building　were　decoupled　by　orthogonal　conditions　and　generalized　mass　and　stiffness　were　obtained,　then　the　responses　of　structure　under　earthquake　excitation　were　solved　by　the　mode　superposition　method.　In　order　to　validate　the　correctness　of　constructed　dynamic　model　and　the　method　of　solving　seismic　response　for　tall　shear-wall　building,　a　sixteen-story　shear　wall　building　was　chosen　to　analyze　dynamic　character　and　seismic　response　by　Simulink　simulation.　Simulation　results　show　that　dynamic　characteristic　and　seismic　response　obtained　by　constructed　dynamic　model　and　the　method　of　solving　seismic　response　are　basically　consistent　with　finite　element,　and　the　errors　of　dynamic　character　and　seismic　response　obtained　by　constructed　dynamic　model　and　the　method　of　solving　seismic　response　are　analyzed　in　the　case　of　different　stiffness　of　linking　beam　and　different　depth-width　ratio　of　shear　wall,　which　can　meet　the　demand　of　application.