Aqueduct　is　the　key　structure　in　water　conveyance　engineering,　which　may　be　damaged　during　earthquake.　Although　numerous　water　conveyance　designs　have　been　built,　the　current　state　of　researches　on　aqueduct　aseismic　design　is　inadequate.　In　this　paper,　based　on　the　fluid-structure　interaction　dynamics　and　response　spectra　analysis,　a　simplified　analysis　method　was　proposed　to　evaluate　the　transverse　seismic　response　of　aqueducts,　and　the　simplified　calculating　results　were　compared　with　the　results　of　the　nonlinear　finite　element　calculation　of　fluid-structure　interaction　and　experimental　results.　The　results　showed　that　the　simplified　analysis　method　put　forward　in　this　paper　could　be　used　to　evaluate　the　transverse　seismic　response　of　aqueducts.　In　the　condition　that　the　pier　height　is　less　than　40　m,　the　first-order　lateral　vibration　mode　of　the　aqueduct　has　a　higher　model　contribution　rate;　the　simplified　calculation　method　can　achieve　extremely　high　accuracy.　The　simplified　calculation　precision　decreases　as　the　height　increases　when　the　pier　height　exceeds　40　m.