The invention discloses a grinding device capable of conveniently collecting chips for a glass substrate. The grinding device comprises a base, vertical rods, water pipes, a sliding groove, connectingcovers, air suction ports, a bolt and grinding grooves, the sliding groove is formed above the base, fixed blocks are fixed at the bottoms of the connecting covers, and the bottoms of the fixed blocks are connected with rubber suckers through damping springs; and magnetic attraction blocks are arranged inside the rubber suckers, the upper portions of the air suction ports are connected with fansthrough air suction air pipes, moreover, the upper portions of the fans are connected with air outlets, the bolt penetrates through the connecting covers and is connected with a connecting telescopicrod, and the grinding grooves are formed in the edges of the outer sides of fixed rotating discs. The grinding device capable of conveniently collecting the chips for the glass substrate is provided with the fixed blocks, and the rubber suckers are uniformly distributed at the bottoms of the fixed blocks, and therefore, a substrate body needing to be ground can be conveniently fixed, and the substrate body can be more stably adsorbed and fixed through the arrangement of the magnetic attraction blocks.