The utility model provides a device for preventing curve beam bridge level side is moved, includes of the containing fixed on pier platform, the cap interior subassembly that contains last component fixed of outer subassembly and the case breast portion of component down. It all is and props the L shape that constitutes by plane connecting plate and perpendicular main tributary to go up the component down. About perpendicular main tributary props two sides be about camber equal and with the curved surface of crooked orientation of the level of curve beam bridge and bend radius unanimity. Inside and outside subassembly and the rubber steel sheet association that fills between them are all place between the pier and the roof beam body and are transmitted roof beam body horizontal displacement. The little displacement of the roof beam body is prevented by rubber steel sheet association, big displacement is by the magnitude is permitted in member restraint and absorption down. When the displacement destroyed rubber steel sheet association, the rubber steel sheet association of changing according to calculating the redesign preparation prevented too big displacement. The utility model discloses can effectively prevent the roof beam that roof beam body horizontal displacement and earthquake arouse, its maintains that the maintenance conveniently. This device is installed on original pier, cap, has reduced the cost that increases pier, cap size.