Fabricated bridge tractor

The utility model relates to the technical field of steel structure bridges, in particular to an assembly type bridge tractor which comprises a fixing seat and a traction seat, a first fixing plate is arranged on the fixing seat, a driving assembly is arranged on the first fixing plate and comprises a rotating rod, a rotating shaft is arranged between the rotating rod and the first fixing plate, and shifting rods are arranged at the two ends of the rotating rod. One end of each deflector rod is rotationally connected with the rotating rod, the other end of each deflector rod is provided with a pusher dog, the two deflector rods are connected through a spring, and a holding rod is arranged on the side, away from the traction base, of the rotating rod. A second fixing plate is arranged on the traction base and fixedly connected with one end of a traction rod, and a plurality of shifting teeth are arranged on the two sides of the traction rod. During use, the holding rod is pushed to swing repeatedly in the hori