In　order　to　explore　the　influence　law　of　Fourier　phase　spectrum　and　amplitude　spectrum　on　seismic　responses　of　different　structural　forms,　a　series　of　artificial　earthquakes　with　different　phase　spectra　and　amplitude　spectra　were　constructed.　Using　SAP2000　finite　element　software,　the　seismic　and　isolation　structural　models　were　built　respectively,　and　the　elastic　and　elastoplastic　time　history　analysis　of　the　structure　was　carried　out.　The　results　show　that　the　change　of　Fourier　spectrum　in　both　elastic　stage　and　elastic-plastic　stage　has　great　influence　on　the　structural　response,　and　the　dispersion　of　structural　seismic　response　in　elastic-plastic　stage　is　greater　than　that　in　elastic　stage.　For　seismic　structures　and　isolated　structures,　with　the　increase　of　magnitude　and　site　conditions　from　Class　I　to　Class　III,　the　dispersion　of　structural　seismic　response　shows　an　increasing　trend.　Therefore,　the　influence　of　Fourier　spectrum　should　be　paid　attention　to　in　the　analysis　of　structural　seismic　response,　and　the　input　ground　motion　should　be　selected　on　the　basis　of　fully　considering　the　characteristics　of　amplitude　spectrum　and　phase　spectrum.　©　2022,　Editorial　Department　of　Journal　of　Wuhan　University　of　Technology.　All　right　reserved.