计算机及网络通信给人们带来巨大便利的同时,也会随时面临某些漏洞和隐患的危害。计算机及网络安全问题与病毒防护一直困扰着人们安全使用计算机。本文分析了危害计算机网络安全的几个方面,就计算机病毒对计算机网络通信系统的危害进行了剖析,通过实例分析OICQ被攻击的实质,提出了保证计算机网络系统通信安全的一些常用方法。 While computer and network communications bring tremendous convenience to people, they will also be exposed to certain vulnerabilities and risks at any time. Computer and network security issues and virus protection have always plagued people using computers safely. This article analyzes several aspects that endanger the safety of computer network, and analyzes the harm of computer virus to the computer network communication system. By analyzing the essence of OICQ being attacked by examples, some common methods to ensure the communication security of computer network system are put forward.