Cantilever preassembling and transferring device

The invention relates to the technical field of cantilever installation, and particularly relates to a cantilever preassembling and transferring device. The cantilever preassembling and transferring device comprises cantilever preassembling equipment, transferring equipment and auxiliary hoisting equipment; the cantilever preassembling equipment comprises a preassembling platform and an adjustablepositioning and clamping unit arranged on the preassembling platform, and the adjustable positioning and clamping unit is used for assembling and fixing a cantilever; the transferring equipment comprises a supporting frame, a traveling mechanism and a turnover mechanism; the turnover mechanism is installed on the supporting frame, connected with the preassembling platform and used for driving thepreassembling platform to turn over, and the traveling mechanism is connected with the supporting frame and used for driving the supporting frame to move; and the auxiliary hoisting equipment is installed on the preassembling