Cover plate glass edge grinding machine

The utility model discloses a cover plate glass edge grinding machine which comprises a working table, a top frame is arranged at the top end of the working table, a lifting device is arranged in the middle of the top end of the top frame, a round extrusion plate is arranged at the bottom end of the lifting device, and a round groove is formed in the middle of the top end of the working table. The device has the beneficial effects that by arranging the positioning driving mechanism, a worker only needs to tread a pedal downwards to drive a plurality of positioning sliding blocks to move close to cover plate glass above the cover plate glass placing table at the same time, so that the cover plate glass can be accurately moved to the dead center of the top surface of the cover plate glass placing table; the circular extrusion plate moves downwards to extrude and fix the cover plate glass, the pedal plate is released, each positioning sliding block is automatically reset under the elastic pulling of the spring,