文中详细介绍了PS/2接口协议的内容、电气特性和标准键盘的第二套键盘扫描码集。给出了基于嵌入式系统的PS/2接口的软、硬件实现方法，并介绍了工控PC外接双键盘的解决方案。通过使用模拟开关CD4052巧妙地解决了工控PC外接双键盘的冲突问题-This paper details the PS/2 interface protocol content, electrical properties and the second set of standard keyboard keyboard scan code set. Embedded systems is presented based on PS/2 interface software, hardware implementation, and describes industrial PC add-in dual-keyboard solution. Through the use of analog switches CD4052 Industrial PC cleverly solved the problem of conflict external dual-keyboard