中文摘要：

随着我国高速铁路的飞速发展，对列车安全性的要求日益提高。由于实际环境与测试环境有区别，某些特定场景靠故障注入的方式能够有效地发现设计上的缺陷。文章使用故障注入的测试方法对安全计算机内部通信总线进行故障注入测试，对通信总线内部的故障进行分析，提出了对通信总线物理层、链路层的软件故障注入方法，并实现了对通信总线的故障注入。

英文摘要：

With the rapid development of high speed railway in our country,the requirement of train safety isincreasing day by day.Because the actual environment is different from the testing environment,the design flaws ofsome particular scenes can be effectively identified by means of fault injection.This article used the fault injectiontest to test the internal communication bus of the security computer,proposed a software fault injection method forcommunication bus physical layer and link layer,implemented the fault injection of communication bus.