With the progress of technology and the development of transportation, the span of bridges is becoming larger and larger. The long-span bridge structures have small stiffness and high flexibility, and are sensitive to the action of wind. Therefore, for long-span bridges, especially long-span suspension bridges, the wind resistance is often the primary consideration in design. The earthquake will cause serious damage and irreparable losses to the bridge in many aspects, and reflect the vulnerability of the bridge structure. Therefore, the seismic performance of the bridge has attracted more and more attention.