Journal of Information & Systems Management SUN Ming 7 3 2017 http://www.dline.info/jism/fulltext/v7n3/jismv7n3_1.pdf In our country, the type and quantity of network attacks have continued to grow. China’s network infrastructure and the important information system is also facing serious security challenges. A variety of network attacks and other network security incidents have become the bottleneck of the development of our national economy, and even endanger the social stability and national security of the country. Computer network is an important part of modern social production and life; therefore, the security of computer network is a problem that has been attached great importance to. Computer network security assessment is the process of identifying the behaviors that endanger the safety of computer network, and it is a relatively active defense measure. On the basis of relevant domestic and international theory and research, and in view of the current problems, the computer network security evaluation model based on swarm intelligence algorithm is proposed in this paper. The feasibility of the algorithm was verified by simulation experiment.