The invention discloses a rapid cutter opening forming clamp. The rapid cutter opening forming clamp comprises a machine base, a positioning part and an upper pressing block. The positioning part and the upper pressing block are arranged on the machine base. The front portions, the rear portions, the left portions, the right portions and the lower portions of a plurality of shear blades which are sequentially distributed are positioned through the positioning part. The upper pressing block is movably arranged above the positioning part through a pressing device. According to the rapid cutter opening forming clamp, one set of arranged shear blades are placed in one positioning part, the front portions, the rear portions, the left portions, the right portions and the lower portions of the shear blades are positioned at the same time, all the shear blades are pressed at a time through the pressing device, only the cutting edge parts where openings need to be formed are exposed to be ground, one set of shear blades can be ground at a time, and meanwhile clamping is rapid and convenient and operation is safe.