Building steel bending correction device

The utility model relates to the technical field of building construction, in particular to a building steel bending correcting device which comprises a base, a support is fixedly connected to the outer wall of the top end of the base, a rectangular frame is fixedly connected to the outer wall of one side of the top of the support, and a motor is installed on the outer wall of the other side of the support. One end of an output shaft of the motor is connected with a two-way screw through a coupler, the outer wall of one side of the two-way screw is connected with a first sliding frame through threads, and the outer wall of the other side of the top of the first sliding frame is fixedly connected with a first correcting plate. The first sliding frame and the second sliding frame are in sliding connection with the inner wall of the rectangular frame through the sliding blocks, stable movement of the first sliding frame and the second sliding frame is guaranteed, the steel straightening device is driven by the m