针对五轴数控机床（CNC）在运行过程中旋转轴角度偏移较大会影响刀具路径控制的问题，提出了旋转角度优化下的五轴数控机床后置处理算法。该算法首先对机床基本结构展开具体分析，使用Hausdoff距离获取机床实际加工曲面与差值曲面之间的匹配误差，并通过误差补偿方法对获取的误差实施补偿处理，依据处理结果完成机床旋转轴角度优化；然后，基于优化结果建立机床坐标系统，通过坐标的变换结果开发机床后置处理器并集成至相关软件中，实现机床的后置处理。实验结果表明，使用本文算法进行机床后置处理时效果较好。

During the operation of 5-axis CNC machine tools， the angle deviation of the rotation axis greatly affects the tool path control. Therefore， a post-processing algorithm of five-axis CNC machine tool with optimized rotation angle was proposed. Firstly， the basic structure of the machine tool was analyzed， the Hausdoff distance was used to obtain the matching error between the actual machined surface and the difference surface， and the error compensation method was used to compensate the obtained error， and the rotation axis angle of the machine tool was completed according to the processing result. Based on the optimization results， the machine tool coordinate system was established， and the machine tool post-processor was developed through the coordinate transformation results and integrated into the relevant software to realize the post-processing of the machine tool. The experimental results show that the proposed method achieves better processing results when used for post processing of machine tools.