In this paper, based on the theory of return traction current in rails, the simulating impedance bonds and the anti-interference research of signal systems, a method to allocate the impedance bond capacity logically is presented. 本论文在电气化铁道牵引回流分布、扼流变压器仿真及信号系统本身防干扰研究的基础上,提出了一套实现电气化铁道沿线扼流变压器合理配置的方法。