The invention discloses a solid plate cutting device. The device includes a base, a dust suction mechanism, a cutting padding block, a cutting padding plate, a first positioning mechanism, a second positioning mechanism, a cutting mechanism and a control mechanism; the dust suction mechanism is arranged above the base, the first positioning mechanism includes a sliding base and a cutting mechanismmounting plate, and the cutting mechanism is mounted on the cutting mechanism mounting plate and consists of a base plate, a retractable rod, a fixing plate and a cutting head. The first positioningmechanism and the second positioning mechanism cooperate with each other under driving of a servo motor, positioning is precise, and a cutter of the cutting mechanism cuts a solid plate between two parallel roller shafts; the needle-shaped cutter is driven by the two roller shafts to conduct circular motion for cutting, cutting seams of the cutter are small, the cutting dimension is accurate, thecutting speed is increased, the cutting quality is improved, and the utilization rate of materials is high. Waste shreds generated during cutting are sucked into a dust storage box below through a dust suction port and are prevented from scattering all around, and therefore the solid plate cutting device is environmentally friendly.