Anti-seismic device for bridge

The utility model belongs to the technical field of bridges, and particularly relates to an anti-seismic device for a bridge, which comprises a top cover, a bottom plate, a damping seat and four protective assemblies, the damping seat and the protective assemblies are arranged between the top cover and the bottom plate, the number of the protective assemblies is four, the four protective assemblies are oppositely arranged, and the damping seat is arranged on the bottom plate. A rectangular space is formed in the center of the protection assembly, the damping seat is wrapped and clamped in the rectangular space, and the protection assembly comprises a sleeve plate, a telescopic plate and a sliding block. The anti-seismic device has the advantages that when the anti-seismic device is installed, the rubber support can be wrapped and clamped through the protection assembly, the rubber support cannot make direct contact with the outside, the protection assembly can achieve the purpose of blocking damp gas and rain