介绍了一种新型的IC卡读写终端的设计，IC卡读写终端是一个单片机嵌入式应用系统。论文从IC卡的国际标准入手，介绍了实现IC卡数据存储的控制方法，并以西门予公司的SLE4442型逻辑加密卡为基础，详细分析了单片机控制IC卡数据读写的软件实现。-The Design and Implementation of the IC Card Read-Write Device Based on 89C51OAbstract:This paper has introduces the designing of a new type IC card reda-write terminal mainly. The terminal is a MCU embedded application system. First of all, proceeding with the International Standard of IC cards ,the paper has introduced the reading and writing technique of IC card data. On the base of SLFA442-a kind of Smart Card with Security of Logic made by SIEMENS , the paper has specified the software and hardware realization of IC card data reading and writing