Based　on　a　typical　continuous　rigid　frame　bridge　with　double-leg　thin-walled　high　piers　in　mountain　areas,　the　influence　of　tie　beam　number　and　its　stiffness　on　the　far-field　seismic　response　was　reseached　using　incremental　dynamic　analysis(IDA)　method,　considering　traveling　wave　effect.　The　results　show　that　the　number　of　tie　beams　has　a　remarkable　effect　on　the　seismic　response　of　rigid　bridge　compared　with　the　tie　beam　position　and　stiffness.　What　is　more,　the　support　response　of　the　rigid　bridges　in　earthquake　is　lower　in　case　of　one　tie　beam　and　for　the　rigid　frame　bridge　with　more　than　two　tie　beams,　seismic　responses　of　the　internal　and　external　limb　will　be　strikingly　different　which　is　unfavourable　for　giving　full　play　to　both　limbs　thin-walled　piers　performance.　The　bridge　with　a　little　more　tie　beams　or　their　unreasonable　position,　is　prone　to　local　vibration.　For　the　larger　span　bridge　of　high　piers　with　many　tie　beams　because　of　other　factors,　it　is　suggested　to　do　special　seismic　research　when　considering　traveling　wave　effect.