With the popularization and application of Internet technology, it has brought great opportunities, challenges and has a significant change to various industries, which entered the Internet age. Computer network is double-edged sword, bringing convenience to people at the same time there are some security risks, seriously affecting the information security of the Internet Age. Therefore, this article is to explore the main computer network security risks and to lower the risks of computer security management measures, thus providing an important guarantee for computer network security.