We present a method of detecting the angle positioning error for indexing fixture by machine vi-sion technology. Using a CCD camera, respectively for indexing fixture on the same edge image in each sta-tion, and through the digital image processing techniques to calculate the edge into the angle between in dif-ferent location, calculated the degree angle to the fixture positioning error and repeated positioning error of measurement. This method is compared with the traditional detection method, it’ s more simple and effi-cient, can realize rapid indexing angle error detection.%提出了一种利用机器视觉技术对分度夹具转角定位误差进行检测的方法。用CCD 相机分别获取分度夹具上同一条棱边在各个工位上的图像，并通过数字图像处理技术计算该棱边在不同工位之间所成的夹角，从而得出分度夹具转角定位误差和重复定位误差的测量。该方法相比传统检测方法，其检测方法更为简单、高效，可以实现分度转角误差的快速检测。
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