目前我国763长周期台网在仪器安装过程中,存在的一个较普遍问题是水平向抗干扰能力差,其原因是摆的安装调试尚未达到设计要求。本文从原理分析和实际观测的角度叙越了逐次逼近法在763水平摆的旋转轴调试及密封中的应用,指出这是提高水平向抗干扰能力的一种有效的调试方法。 At present, China’s 763 long-period network in the instrument installation process, there is a more common problem is the level of anti-interference ability is poor, the reason is that the installation has not yet reached the design requirements. This paper describes the application of successive approximation method in the debugging and sealing of the rotating shaft of 763 horizontal pendulum from the perspective of principle analysis and practical observation. It is pointed out that this method is an effective debugging method to improve the horizontal anti-interference ability.