Abstract: In order to speed up the IPv6 transformation of the railway 12306 Internet ticketing and reservation system (12306 for short), this paper designed the primary phase scheme of the 12306 IPv6 evolution transformation through the investigation of the user access process of 12306 and the analysis of the difficulties in the 12306 IPv6 evolution transformation. Based on the actual situation, the paper studied a transformation method that supported users to access using IPv6 addresses based on a dual stack architecture. This method covered the entire process of domain name resolution, traffic distribution, and application service transformation. It implemented the goal of supporting users to access 12306 using IPv6 addresses with minimal transformation costs, and achieved good application results.