The car rear view mirror edge chamfering machine is a specialized machine for polishing the top/bottom chamfer of car rear view mirror. PLC control system is adopted to control human-computer interface. A stepping motor is adopted as a transmission machine to transfer the glass to sucker precisely. The grinding head of each production line can be set for chamfer-edging-fine edging-fine chamfer. It will process two pieces of glass. The specially designed grinder pressure makes the glass lean on the machine closely to ensure the fluency and uniformity of cutting and the grinding process and avoid the appearance of cracking.