用巨磁电阻材料构成磁电子学新器件，已开始在信息存储领域成功地获得了应用．文章介绍了用于计算机硬磁盘驱动器的巨磁电阻磁头和巨磁电阻随机存储器，描述了它的工作原理、性能特点及发展趋势．指出巨磁电阻材料在传感器方面的应用也令人瞩目，有着广阔的市场前景． Magnetoresistive materials with giant magnetoresistance devices, has begun to successfully obtain applications in the field of information storage. This paper introduces giant magnetoresistance heads and giant magnetoresistive random access memories used in computer hard disk drives, and describes its working principle, performance characteristics and development trend. It is also pointed out that the application of giant magnetoresistance material in the sensor is also remarkable, which has a broad market prospect.