Specific cutter for sealing ring manufacturing

The utility model relates to a specific cutter for sealing ring manufacturing and a bar-shaped rubber sealing member can be cut by the specific cutter into a groove. The specific cutter comprises a pedestal, a fixing device arranged on the pedestal and fixing the bar-shaped rubber sealing member, and a cutting device arranged on the pedestal, wherein the cutting device is formed by a blade capable of cutting the bar-shaped rubber sealing member to form a groove section forming an acute included angle between the bar-shaped rubber sealing member and a length direction, and an operation assembly driving the blade to move. By the use of the specific cutter, a sealing ring joint can be manufactured in a standard way, flatness of the groove section and symmetry of two end joints can be guaranteed and tight joint sealing surface can be achieved; safe operation of transformers applying the sealing ring can be ensured; and cutting operation can be conveniently and quickly realized, so reworking efficiency and material loss can be reduced.