The height of the guide roll is 55mm~25mm, which is used for the entrance of the rolling mill for the finishing rolling of rods and wires. "A pair of compression springs + two adjustment wheels" adjusts the opening and closing of the support arm, thereby adjusting the opening of a pair of guide rollers; there is a wheel-type fine-tuning device, which can fine-tune the opening of the guide and guard rollers online. This adjustment is a single Point symmetrical adjustment. Cooling water enters from the upper part of the box body and sprays out from the water spray holes on the box body to cool the guide rollers. The base and the cabinet are separated and connected by a dovetail, which can realize the quick installation of the guide and guard.