The constitution and operation principle of computer monitoring system of dual-track power supply 6-tons medium frequency induction furnace manufactured by American Inductotherm International Corporation have been introduced with emphasis upon the control mode of PCI bus interface and solution to malfunction. 介绍美国应达公司生产的双供电6t中频感应电炉计算机监控系统的组成和工作原理,着重分析了PCI总线接口控制方式及故障解决。