Laser cutting machine capable of improving plate positioning precision

The utility model relates to a laser cutting machine capable of improving plate positioning precision, and belongs to the field of laser cutting machines, the laser cutting machine comprises a placing table and a laser generator, the placing table comprises a plurality of sawtooth strips, all tooth tips of the sawtooth strips are located in the same plane and face a workpiece, and an edge blocking mechanism is arranged on the placing table; the edge blocking mechanism comprises an edge blocking plate, the edge blocking plate slides relative to the containing table, the sliding direction of the edge blocking plate is perpendicular to the table top of the containing table, and the height position of the tooth top of the sawtooth strip is located in the sliding stroke range of the edge blocking plate. The plate on the placing table is subjected to edge blocking and limiting through the edge blocking plate, so that the edge of the to-be-machined plate abuts against the edge blocking plate, placing and positioning