Bridge structure of industrial traction vehicle

The utility model relates to an industrial traction vehicle, and discloses a bridge structure of the industrial traction vehicle. The bridge structure comprises a back wheel, a back frame, a square pipe, middle ribs, a front wheel support plate, a wheel axle, front wheels and a bottom plate, wherein a vehicle head is provided with the wheel axle, the two ends of the wheel axle are respectively provided with each front wheel, the middle of the wheel axle is welded with the middle ribs, the other end of each middle rib is inserted into the back frame and is welded, the left end of the square pipe is welded with the back frame, the surface of the square pipe is welded with the middle ribs, the right end of the square pipe is welded with the left end of the front wheel support plate, the right end of the front wheel support plate is welded with the wheel axle, the bottoms of the middle ribs and the front wheel support plate are welded with the bottom plate, and the back frame is only fixedly provided with one bac