信息技术的快速发展为各行业领域注入新鲜的活力，但随之而来的网络攻击等问题也日益严峻，如木马、病毒 等，都影响网络的安全运行，严重情况下将有大量重要信息被窃取、网络运行瘫痪等情况发生。通过实践研究发现，引入相应 的防御策略求精关键技术，对网络安全运行可起到极大的作用。本文将对计算机网络防御策略求精现状、计算机网络防御策 略求精关键技术进行探析，并提出强化计算机网络防御策略求精技术的相关建议。

The rapid development of information technology has injected fresh vitality for the industry field. But the following cyber attacks have become more and more severe, such as Trojans, viruses, etc., which influences the safe operation of network. In severe cases, there will have a large number of important information being stolen or network paralysis. Through the research and practice, it is found that the introduction of corresponding key technologies of defense policy refinement has a great effect on the safe operation of network. This paper studies on the status and the key technologies of computer network defense policy refinement, and proposes relevant recommendations about strengthening technologies for computer network defense policy refinement.