Fixing device for detecting edge of glass substrate

The utility model discloses a fixing device for detecting the edge of a glass substrate. A first circular through hole and a second circular through hole are respectively formed in the end faces of afirst clamp cushion block and a second clamp cushion block; a connecting circular pipe is movably mounted in the second circular through hole, and a gear ring is fixed to the end face of the connecting circular pipe; the connecting shaft is slidably installed in the first circular through hole and the second circular through hole, the supporting cushion block is slidably installed on the end faceof the second clamp cushion block, a strip-shaped through hole is formed in the surface of the supporting cushion block, and limiting teeth are evenly distributed on the side wall of the strip-shapedthrough hole and meshed with the gear ring. The clamp is fixed through the clamp cushion blocks on the two sides and the nuts. The clamp cushion block is made of stainless steel materials and has theadvantages of being high in