直接测量法和排列互比法是测量分度头示值误差的两种常用方法,文章从测量程序、测量模型以及不确定度传播律等方面对这两种方法的原理进行比较研究,从而为测量人员更好地理解及合理地选择相应测量方法提供一些思路。 The two methods commonly used to measure the indication error of indexing head are direct measurement method and permutation method. The article compares the principle of these two methods from measurement procedure, measurement model and the law of propagation of uncertainty, Survey personnel to better understand and select the appropriate measurement methods to provide some ideas.