Fixing assembly for steel structure machining and assembling

The utility model discloses a fixing component for processing and assembling a steel structure, which comprises a bottom plate, the upper surface of the bottom plate is respectively provided with a guide slide rail and two vertical plates, the outer sides of the two vertical plates are jointly and movably connected with a pressing plate, the inner side of the guide slide rail is rotatably connected with a bidirectional screw rod penetrating through the bottom plate, one end of the bidirectional screw rod is fixedly connected with a knob, and the other end of the bidirectional screw rod is fixedly connected with a rotating shaft. Sliding blocks in sliding connection with the guide sliding rails are symmetrically connected to the outer side of the two-way lead screw in a screwed mode, and a multi-stage supporting plate is fixedly installed on the upper surface of each sliding block. The rotary knob is rotated to drive the bidirectional lead screw connected with the rotary knob to rotate, so that the two sliding