Single-face thinning process applied to hard and brittle sheet material

The invention discloses a double-sided thinning process applied to a hard and brittle sheet material. The double-sided thinning process comprises the following steps: loading a first workpiece to a first loading and unloading station on a turntable; rotating the turntable to transfer the first workpiece to a first processing station on the turntable; the back face of the first workpiece is ground, and meanwhile the second workpiece is loaded to a first loading and unloading station; when machining of the back face of the first workpiece is finished, the rotating disc is rotated so that the first workpiece can be transferred to a second loading and unloading station on the rotating disc, and the second workpiece can be transferred to the first machining station; the first workpiece is moved away from the second loading and unloading station to be turned over, meanwhile, the back face of the second workpiece is ground, and a third workpiece is loaded to the first loading and unloading station; and the first wor