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In this paper, the method of machining and correcting the two sides of tooth surface of spiral bevel gear pinion with the same cutter head and machine tool is studied. In this method, the cutting procedure and tool path are planned, and the calculation of motion parameters is completed. According to the characteristic that NC machine tool can adjust cutter location in real time, the tooth length and curvature are corrected, and the calculation model of tooth surface deviation is constructed. Five-cutter is used as the target tooth surface to optimize the cutting parameters. An example is introduced to carry out the analysis and gear cutting experiments, which verifies the feasibility of the proposed method.