Rear anchoring device of bridge fabrication machine

The utility model provides a bridge fabrication machine back anchoring device which comprises an anchor rod, an upper locking system and a lower locking system, the anchor rod penetrates through a box girder top plate, the upper locking system locks the upper portion of the anchor rod on a bridge fabrication machine, the lower locking system locks the lower portion of the anchor rod on the box girder top plate, and the lower locking system comprises a carrying pole beam and an anchor rod locking piece. A plurality of carrying pole beams are distributed, each carrying pole beam is arranged in a box beam hole in the transverse direction and penetrates through all anchor rods located in the same transverse line in the same box beam hole, wedge-shaped blocks are fixed to the tops of the two ends of each carrying pole beam, anchor rod locking pieces penetrate through the anchor rods and are locked to the bottoms of the carrying pole beams, and the upper locking system is locked. And the wedge-shaped block on each