The utility model discloses an aseismatic bearing for a bridge in order to improve the aseismic capability of the bridge. The aseismatic bearing comprises an upper anchor plate assembly (1) and a lower anchor plate assembly (2). The aseismatic bearing also comprises an upper sliding plate assembly (3) fixedly connected with the upper anchor plate assembly (1), a lower sliding plate assembly (4) fixedly connected with the lower anchor plate assembly (2), and two speed lock-up devices (5) respectively arranged at the two sides of the bearing. The upper sliding plate assembly (3) and the lower sliding plate assembly (4) are in sliding fit through a guide rail assembly (7); the upper sliding plate assembly (3) and the lower sliding plate assembly (4) are fixedly connected with cylinder bodies and pistons of the lock-up devices (5) respectively; and the action direction of the speed lock-up devices (5) is parallel to the direction of a guide rail. The aseismatic bearing has the beneficial effects that the load can be effectively dispersed in case of great vibration caused by earthquake and other factors, the stress of the bridge structure is more uniform, and the performance is more stable, thereby preventing or reducing the damage of natural calamities to the bridge structure.