对重载齿轮电化学齿向修形中电流密度的分布规律进行了探讨，得出沿齿向各处金属蚀除厚度与电流密度分布的关系，对工程机械齿轮进行了电化学修形加工，加工后的齿轮达到了齿向修形形状和修形量的要求。 The distribution of current density in electrochemical tooth profile modification of heavy-duty gears was discussed. The relationship between metal erosion thickness and current density distribution along the tooth-to-tooth direction was obtained. Electrochemical modification of engineering gears was carried out. After processing the gear to achieve the shape and shape modification requirements.