Aimed at the problem of gear shape precision of bevel gear cutting, the cutting force was taken as the research object, ABAQUS finite element software was used to simulate the process of gear shaping with different machining parameters, and the cutting force distribution cloud diagram during the process of gear shaping was obtained. By analyzing the variation law of cutting force under different machining parameters, it is concluded that the cutting speed and circumferential feed have a great influence on the cutting force during the gear shaping process. The optimal parameters were used for test cutting. Compared with the tooth profile report before and after parameter optimization, the optimized tooth profile accuracy is improved by 9.3 μm