因汽车齿轮存在制造和安装误差，以及轮齿的弹性变形、扭转变形、热变形等因素，使齿轮在啮合过程中产生冲击、振动和偏载。通过分析指出，汽车齿轮的修形可以改善齿轮传动。分析并比较了各种修形方法。 Due to manufacturing and installation errors of gear, gear deformation, deformation, heat deformation and other factors, gear meshing process in the impact, vibration and partial load. Through the analysis pointed out that the modification of automotive gears can improve the gear transmission. Analysis and comparison of various repair methods.