文章给出了一种对网络计算机硬盘信息进行访问控制的安全隔离卡实现方案,介绍了基于PCI扩展ROM控制芯片CH364的双硬盘隔离卡的组成及工作原理,并且详细讨论了其硬件设计。该安全隔离卡采用对用户透明的物理隔离技术和网络连接控制技术,可对网络计算机的硬盘信息实施有效的保护。 This paper presents a scheme of implementing security isolation card for access control of network computer hard disk information, and introduces the composition and working principle of dual hard disk isolation card based on CH364 of PCI expansion ROM control chip. The hardware design is discussed in detail. The security isolation card uses the user-transparent physical isolation technology and network connection control technology, network computer hard drive information to implement effective protection.