Firstly, the author collected and analyzed the latest stuffs about IPv6 protocol and IPv6 transition at home and abroad, researched its new characteristics, then analyzed and compared three familiar transition methods, Dual Stack, Tunnel and IPv6/ IPv4 Protocol Translation& Address Translation. 本文首先收集并分析国内外关于IPv6协议及IPv6过渡问题的最新资料,研究IPv6新特性,对目前常用的三种过渡技术双协议栈、隧道和IPv6/IPv4协议与地址转换进行分析比较。