With the development of science and technology progress, electronic information technology has been accepted by the public, the network information popularization, Internet plus has also become a hot topic, the campus network has become the standard configuration of daily life and study, application of computer and mobile phone also will be more extensive in our life gradually eroded by the network today, network security issues more and more attention from all circles of society, has become one of the main existing problems of campus network. Campus network faces the problem of network security is becoming more and more serious, so how to effectively protect the network security problem, and more become the key problem, set up a firewall, anti-virus software, strengthen identity authentication and data encryption is the effective protection measures. In this paper the present safety hazards and protective measures of campus network are analyzed.