The test turntable and photoelectric auto-cdlimator are used in the high-accuracy test system for antenna-driven compo nents to cany out movement precision test. For the test system, according to the test principle of the system, this paper builds the er ror modeling by homogeneous transformation matrix, analyzes error factors affecting the accuracy of system by the photoelectric auto collimator arid finishes the error distribution by Monte Carlo in matlab. The experimental results show the correctness of the analysis.%天线驱动组件高精度测试系统是利用转台与光电自准直仪对驱动组件进行运动精度测试的.针对驱动组件高精度测试系统,结合驱动组件运动精度测试原理,运用齐次变换矩阵建立测试系统的误差模型；根据光电子准直仪工作原理,对影响测试系统精度的误差因素进行分析；在此基础上通过matlab软件用蒙特卡洛法进行运算,完成误差分配.实验结果证明了分析的正确性.
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