In the present invention, by conventional metal zipper polishing machine is installed only the air blower on the trailer, but the task given to bring the zipper teeth grinding when air cools the heat along the zipper teeth surface during high speed grinding fever is conducted, the zipper teeth are stick stretched toward the zipper tape (= zippered cloth) problems with air blower is because the injection at high speed to change the frame position of the zipper teeth being conducted in a horizontal direction by the abrasive portion of the zipper teeth do not place on a metal zipper polishing machine, the working speed slow and, to improve the problems safety disaster industrial has generated much, grinding machine main body 100, the guide roller unit 200, the cooling jet type metal fastener polishing part 300, a feeding roller type transfer rails 400 by being composed of, it can make the zipper teeth top surface of the metal zipper to inject cooling air towards the primary, secondary, car polishing Sikkim and at the same time the zipper teeth bottom surface being polished instant cooling the zipper teeth surface conduction with a high fever, zipper teeth are zipper tape (= zippered cloth) may be reductions of 80% the phenomenon stick stretched toward, resulting zipper teeth piece when the zipper chijeol work (glass-Tees) and well away from the zipper tape without to 70% improvement compared to speed on the existing number, and first and second grinding roller height jeeobueul through the first and second grinding roller and the height can be adjusted between metal zipper, it is possible to uniformly polish the upper surface of the metal zipper teeth zipper, produce high-quality metal zipper be that there is a purpose to provide a cooling air jet type apparatus for polishing a surface metal zipper that.