Abstract. As the development of informatization process and the rapid development of Internet, network security problems are highlighted gradually.College is a unity that requires large quantity and high quality of knowledge and information, and the network provides college students more opportunities to learn and communicate, but it also poses a serious crisis of Internet security.This paper has a deep analysis of present situation and necessity of college students' computer network security, and suggest that network information security education should be attatched great importance as a preventive measure and important countermeasures.Twenty-first Century is the era of information and technology, as an important channel of acquiring knowledge and information and a wide platform of all kinds of cultural dissemination and communication, network has played a positive role in promoting the exchange of social information, making personal interaction convenient, promoting social and economic development. Along with the rapid development and maturity of the campus network, network activity has become one of college students’ daily activities, and made a profound effect on students in all aspects.