Comb tooth type bridge expansion joint device

A comb tooth type bridge expansion joint device comprises a first comb tooth plate and a second comb tooth plate which can move relatively in the longitudinal direction, and is characterized in that sliding grooves are formed in the comb tooth side wall of the first comb tooth plate and are horizontally distributed in the length direction of comb teeth, and limiting pieces are arranged on the comb tooth side wall of the second comb tooth plate in an outward protruding mode; the limiting piece extends into the sliding groove and can longitudinally slide relative to the sliding groove. Compared with the prior art, the comb tooth type bridge expansion joint device has the advantages that the longitudinal sliding groove is formed in the comb tooth side wall of the first comb tooth plate, the limiting piece installed on the comb tooth side wall of the second comb tooth plate can stretch into the longitudinal sliding groove, when the expansion joint device conducts longitudinal displacement, the limiting piece move