IPv6/IPv6+ is applicable to more scenarios,diverse user needs and complex security environment,and in the process of comprehensively promoting the commercial deployment of IPv6 and the innovative research of IPv6+,network security issues are also paid more attention.However,the new IPv6+ technology is still being researched and piloted,and its security threats have not yet been fully exposed.It is necessary to combine the latest standard research progress and pilot application experience at home and abroad to analyze the security risks and problems that may be brought by the new IPv6+ protocols,technologies and address encoding,and strengthen IPv6+ technical security management and protection means in order to synchronise the planning,construction and use of security protection measures with IPv6 network transformation,and carry out forward-looking layout research for the construction of IPv6/IPv6+ next-generation network security protection system.