本文介绍了双串口CPU W77E58 在“某型号导弹发射车电量测试系统”中的应用。W77E58作为PC 机与多个下位机之间通信的中转机构，大大简化了硬件电路，提高了整个系统工作的可靠性，使编程工作也简单易行。经过实际应用，获得了良好的预期效果，今后在类似的系统中有广阔的应用前景。关键词：双串口 W77E58 串口通信Abstract：In this article, the application of W77E58 which is a kind of double serialport CPU in “some type of missile launcher’s electric quantity test system” isdiscussed.W77E58 is a transfer organ between PC and down machines, which not only simplifies the hardwired connection and the programming, but also improves the reliability of the system. It is running well in practice and can be applied in similar systems.Key words: double serial port W77E58 serial communication