The invention provides a glass grinding machine which comprises a support, buckets, a fan, a PLC control structure, a grinding turntable, a telescopic pipe, a workbench, a positioning block, a moving rod, a sliding groove, a motor, a protection box and a sloping plate, wherein the support is arranged between the protection box and the sliding groove, and the buckets are arranged on the two sides of the telescopic pipe; the fan is arranged at the bottom of the workbench. Due to the arrangement of the PLC control structure, the positioning block, the telescopic pipe, a leather sheath, a strip-type hole, the fan and a collecting bag, the glass grinding machine is beneficial to convenient operation, improves the degree of intelligence, prevents glass from sliding, improves the positioning effect, further is flexible in water spraying washing, is convenient to suck off waste residues, and reduces potential safety hazard, therefore improving the working efficiency, completing functional diversity, and achieving the best grinding effect.