Positioning device with lead screws

The utility model discloses a positioning device with lead screws, which comprises a bottom plate, a lifting plate, a jacking cylinder and two positioning components placed in a staggered manner. Each positioning component comprises a motor, a lead screw, a driving device, two lead screw support seats and two moving blocks, the driving device is used for driving the lead screw to rotate, the motors and the lead screw support seats are fixed onto the bottom plate, turning directions of two ends of each lead screw are opposite, through holes are disposed on the lead screw support seats, two ends of each lead screw are respectively rotationally inserted into the through holes of the corresponding support seats, the moving blocks are provided with screw holes, two ends of each lead screw are meshed in the corresponding screw holes in a relatively moving manner, the moving blocks are positioned on inner sides of the lead screw support seats, push rods are convexly arranged at upper ends of the moving blocks, a holding space for holding the lifting plate is formed among the moving blocks of the positioning components, a plurality of jacking columns used for supporting glass substrates are convexly disposed at the edge of the lifting plate, and the jacking cylinder is fixedly arranged in the holding space. The push rods on the moving blocks push the glass substrates inwardly so as to adjust positions of the glass substrates, and accurate positioning of the glass substrates is eventually realized.