Spanning type transfer construction method for downward moving formwork supporting bracket

The invention discloses a spanning type transfer construction method for a downward moving formwork supporting bracket. The construction method specifically comprises the following steps that a walking motor arranged on a reversing trolley works to drive walking wheels to rotate, the reversing trolley moves to the front end of a front guide beam, and a front reversing device is installed at the bottom of the reversing trolley through four sets of hanging rods; then the reversing trolley moves and returns to the front end of a main beam, and an L-shaped beam is fixedly installed through a supporting rod; the construction method does not occupy the linear construction period, and the construction period of a single-hole cast-in-place box girder can be effectively shortened; according to themethod, a gantry crane and a moving formwork front guide beam top reversing trolley are used for removing the supporting bracket in a spanning mode, the terrain limitation is avoided, the equipment utilization rate can be eff