Plate positioning device based on laser cutting

The utility model belongs to the technical field of laser processing equipment, and particularly relates to a plate positioning device based on laser cutting, which comprises a supporting base, a longitudinal positioning block is slidably connected to the top end of the supporting base, a fixing plate is fixedly connected to the top end of the longitudinal positioning block, and a linkage block is fixedly connected to one side of the fixing plate. A transverse positioning block is arranged below the fixing plate, the linkage block is rotationally connected with the transverse positioning block, a pressing block is fixedly connected to the bottom end of the transverse positioning block, and a laser cutter is slidably connected to the side, away from the linkage block, of the transverse positioning block; when the laser cutter moves transversely and longitudinally, the laser cutter can press and fix a plate, so that the situation that the cutting position is not accurate enough due to the fact that one end of t