A　curved　bridge　test　model　with　a　scale　ratio　of　1:10　was　constructed　to　investigate　the　influence　of　site　conditions　on　curved　bridges　with　longitudinal　slopes　based　on　a　similar　theory.　The　natural　ground　motions　of　five　different　groups,　namely,　Sites　A-E,　were　selected　from　the　Pacific　Earthquake　Engineering　Center　(PEER)　seismic　database,　and　the　shaking　table　model　test　was　conducted　under　horizontal　unidirectional　and　bidirectional　excitations.　Results　showed　that　the　structural　response　of　the　curved　bridge　is　sensitive　to　the　ground　motion　of　different　site　conditions.　Spatial　characteristics　are　observed　in　the　main　girder　structural　response　of　the　curved　bridge.　When　the　curved　bridge　is　parallel　to　the　direction　of　the　principal　ground　motion,　the　rotation　effect　of　the　main　girder　is　greater　than　that　perpendicular　to　the　direction　of　the　principal　ground　motion.　The　rotation　effect　of　the　main　girder　leads　to　evident　beam　end　and　bearing　displacements　at　the　low　pier.　The　seismic　excitation　direction　and　pier　height　notably　affect　the　displacement　response　of　the　pier,　and　the　tangential　displacement　response　of　the　fixed　pier　is　sensitive　to　seismic　excitation.