Abstract: Information security vulnerability was one of the important causes of information security problems and the key factor to implement network attack and defense. How to find vulnerabilities information and reduce the adverse impact on the society and the national information security, the research on vulnerability became the focus of information security domain, and the classification of vulnerability was the basis of vulnerability research. This paper briefly introduced and summarized the definition and classification of security vulnerabilities at home and abroad, and also prospected the future security vulnerabilities classification work.