本文分析了在多机数据通信过程中经常发生的干扰因素,叙述了采用容错技术——主要包括“一码发三取二”容错和“人机对话误操作”容错等软件设计方法.此方法提高了试验台微机主从通信网络系统的整体扰干扰能力.文中绘有该软件设计算法的逻辑框图. This paper analyzes the interference factors that often occur in the process of multi-machine data communication, and describes the design method of fault tolerant technology, which includes fault tolerant technology such as fault tolerance of “one code, three codes and two errors” and faulty operation of “man-machine dialogue” Which improves the overall interference and interference ability of the host computer and the communication network system of the test bench.This paper draws the logic block diagram of the software design algorithm.