Laser machining device

The invention discloses a laser machining device. The laser machining device comprises a machine base; a laser mechanism and a clamping mechanism are arranged on the machine base; the clamping mechanism comprises a gear and an inclined channel; a first rack meshing with the gear is arranged on the gear; a plurality of first limiting arms are hinged to the first rack at equal intervals; the inclined channel is located above the gear; a sliding groove is formed in the machine base; a second rack is connected in the sliding groove in a sliding mode; a first spring is arranged between the second rack and the sliding groove; a plurality of second limiting arms are fixedly connected to the second rack at equal intervals; an elastic pad is arranged between the first limiting arms and the second limiting arms; a plurality of positioning grooves communicating with the sliding groove are formed in the two sides of the sliding groove;, and positioning blocks are connected in the positioning grooves in a sliding mode. Ac