Steel plate cutting device

The utility model relates to the technical field of cutting machinery, and discloses a steel plate cutting device which comprises a bottom plate, an anti-skid hair layer is fixedly installed on the top of the bottom plate, a first guide rail and a second guide rail are arranged on the left side of the bottom of the bottom plate, a first sliding block is slidably installed in the first guide rail, and a second sliding block is slidably installed in the second guide rail. A connecting rod arranged in the vertical direction is fixedly installed at the rear end of the first sliding block, a clamping arm is fixedly installed at the top of the connecting rod, a first rotary knob is movably installed at the top of the clamping arm, a screw is fixedly installed at the lower end of the first rotary knob, an anti-skid pad is fixedly installed at the bottom of the screw, and a clamping opening is formed in the face, close to the screw, of the first sliding block. The shape and specification of the second sliding block a