The utility model discloses a prevent in continuous steel box girder bridge fulcrum department bridge of layer fracture structure of mating formation of mating formation, lay at continuous steel caseroof beam or continuous steel including superposeing in proper order waterproof concrete layer and asphalt concrete pavement layer on the concrete combination beam, in the asphalt concrete pavement layer, be located bridge hogging moment region, one at least thermoplastic elastomer metalling has been laid to edge bridge beam width degree direction, waterproof concrete in situ, be located with each way in the upper surface that the thermoplastic elastomer metalling contacted, induced seam has together been seted up along bridge beam width degree direction. The utility model discloses can solvecontinuous steel case roof beam and continuous steel the supporting point position layer fracture problem of mating formation in the concrete combination beam, characteristics such as have that theatress is clear and definite, safe and reliable, performance are outstanding have compensatied the not enough of traditional steel box girder structure, the design of combination beam structure momentof flexure district, the utility model discloses the cost is low, the construction is convenient, and application scope is wide, has good application prospect.