Automatic high-precision stone slab edge cutting machine

The invention relates to the related field of cutting machines, in particular to an automatic high-precision stone slab edge cutting machine which comprises a placing table, a fixing frame, a lead screw sliding frame, a transverse sliding rail, a cutting mechanism, a U-shaped positioning frame, a clamping plate, a screw rod, a hand wheel and the like. According to the stone slab cutting device, the cutting mechanism is arranged on the transverse sliding rail, visible light is generated through rotation of a laser indicator, a worker can judge the cutting position of a cutting knife according to the moving track of the visible light, and therefore the position of the cutting knife can be conveniently and timely adjusted, the stone slab cutting accuracy is improved, and the cut stone slab quality is improved; and the cleaning brush swings left and right in a reciprocating mode to sweep chippings on the stone slabs into the protective cover, the follow-up stone slab cleaning workload is reduced, dust pollution t