现行社会发展形势下,计算机网络的应用越来越普遍,在人们的生活、学习、工作中发挥着愈来愈重要的作用。然而,网络的虚拟性、开放性使得人们在享受计算机网络便利一面的同时,也面临着的较大的安全威胁,针对计算机网络安全威胁,必须采取有效的防护措施,避免计算机网络系统出现安全问题。本文就计算机网络安全防护及其对策进行了相关的分析。 Under the current situation of social development, the application of computer networks is becoming more and more common, playing an increasingly important role in people’s life, study and work. However, the virtual nature and openness of the network make people enjoy the convenience of the computer network as well as the larger security threats. In order to protect the computer network security, effective protection measures must be taken to avoid the security problems of the computer network system . This article has carried on the related analysis to the computer network security protection and the countermeasure.