Bridge building steel structure transporting method

The invention provides a bridge building steel structure transporting method used for transporting a bridge building steel structure from a storing position of the steel structure to a bright position. The bridge building steel structure transporting method comprises the following steps of gantry crane track laying, specifically, a gantry crane track extends to the river bank position where a bridge needs to be built from the storing position of the steel structure; trestle wharf constructing, specifically, a trestle wharf is built on the downstream side or the upstream side of the to-be-builtbridge, a trestle track is built on the trestle wharf, and the trestle track is connected with the gantry crane track in a butt-joint mode and located on an extension line of the gantry crane track;and steel structure transferring, specifically, a transporting ship drives into the trestle wharf in the trestle direction and is fixed in place to wait, steel components are transported to the trestle track of the trestle wharf along the gantry crane track through a gantry crane and located over the transporting ship, and the steel components are put into a cabin of the transporting ship throughthe gantry crane and then transported to the bridge position through the transporting ship. According to the transporting method, the water and land transferring problem of the large bridge building steel structure can be solved.