Positioning support for hydraulic lifting of large-area steel structure

The utility model relates to the technical field of hydraulic lifting of large-area steel structures, and discloses a positioning support for hydraulic lifting of large-area steel structures, which comprises a base, a placing frame is arranged above the base, two fixing frames are fixedly mounted on the upper surface of the placing frame, and three roll shafts are rotatably connected to the inner wall of each fixing frame. A stepping motor is arranged on the outer side of each fixing frame, the power output end of each stepping motor penetrates through the fixing frames and is fixedly connected with the ends, close to the stepping motors, of the two roller shafts, the outer surfaces of each set of roller shafts are rotationally connected with a crawler belt, and movable frames are fixedly installed on the side faces, close to each other, of the two crawler belts; two electric telescopic rods are fixedly mounted on one side surfaces, close to each other, of the two movable frames; the roller shafts can be driv