Positioning device for steel structural member assembly

The utility model relates to the field of steel structure assembly, and discloses a steel structure component assembly positioning device which comprises a supporting frame, a supporting plate and a base, the supporting plate is fixedly connected to the top of the base, a first guide rail is movably installed in the supporting plate, a connecting block is fixedly connected to the top of the first guide rail, and the supporting frame is fixedly connected to the top of a motor. A fixing frame is fixedly connected to the top of the second guide rail, threaded rods are movably installed in the fixing frame and the supporting frame, and positioning plates are arranged on the peripheries of the threaded rods and the tops of the supporting frame and the fixing frame. The steel structure can be driven to be in butt joint and positioned through the first guide rail and the second guide rail, the supporting frame and the steel structure can be driven to rotate through the motor to be adjusted to the needed butt joint a