For the problem of multi-beam antenna pointing for GEO satellite, a method of precise measurement of multi⁃beam antenna pointing has been studied. In the case that the inherent coupling interference exists among transmitting channels of satellite, the principle and formula for measurement of satellite antenna pointing are deduced in detail, where orthogonal beacon signals are sent from the geosynchronous satellite to ground stations. Then the influence of various error sources on precise measurement is discussed system⁃atically. Finally the validity and feasibility of this method are demonstrated by simulations, where some streamline recommendations are also proposed to provide theoretical reference for engineering applications.%针对地球同步轨道（ GEO ）卫星的多波束天线指向问题，研究了一种精确测量卫星天线指向的方法。在卫星发射通道间存在固有耦合干扰的情况下，通过地面测量站接收 GEO 卫星多波束天线发射的正交信标信号，推导并建立了测量卫星天线指向的数学模型；系统分析了各种误差源对测量精度的影响。通过仿真分析证明了该方法的有效性和可行性，为工程实现提供了参考依据。
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