The invention relates to a microcrystalline glass polishing process. The process comprises the following steps: step 1, grinding and thinning the surface of microcrystalline glass to remove cutting line marks on the surface of the microcrystalline glass; step 2, carrying out impurity removal on the ground microcrystalline glass; step 3, carrying out ultrasonic cleaning on the microcrystalline glass subjected to impurity removal; step 4, polishing the microcrystalline glass subjected to ultrasonic cleaning; step 5, detecting roughness of the polished microcrystalline glass, and carrying out fixed-point polishing according to the roughness difference; and step 6, detecting the roughness of the microcrystalline glass subjected to fixed-point polishing again, if the microcrystalline glass is unqualified, executing the step 5 to carry out fixed-point polishing again, and if the microcrystalline glass is qualified, obtaining the polished microcrystalline glass. The glass can be ground in a targeted manner by combining a polishing process, so that in the produced microcrystalline glass, the roughness is reduced, the flatness is improved, the original production time is shortened, the production cost is reduced, and the production benefits of manufacturers are improved.