介绍了ＰＣ机技术在煤矿井下电机车指挥调度系统中的应用方案；阐述了“信、集、闭”系统的编程依据及方法；总结了在系统设计、安装、调试中的几点体会。 The application scheme of PC technology in command and dispatching system of coal mine electric locomotive is introduced. The programming basis and method of “letter, set and closed” system are expounded. Some experiences in system design, installation and debugging are summarized.