This paper studies the process of the marketing of Beijing's traffic policies on new media platforms from the perspective of government, taking Beijing's regulations on the management of online taxi booking services and Beijing regulations on motor vehicle parking as the research objects. Then this paper summarizes the process of policy marketing. It is found that the current policy marketing of new media for government affairs has effectively expanded the channels of information disclosure and improved the social governance capacity. The overall marketing content is mainly based on policy interpretation and policy publicity, and the number of "opinion solicitation" content has increased significantly. Meanwhile the marketing time is consistent with the policy making process and the marketing carrier is based on a major account. And the following problems exist: 1. New media have not set up mutual linkage;2. The functions of new media for government affairs are limited, and the functions of agenda setting and interaction between the government and the people need to be developed; 3. The function positioning of new media for different government affairs is not clear. Therefore, this paper puts forward the following suggestions: 1.Establish public orientation and regard public as the core during policy marketing c; 2.Enhance perceived usefulness and enhance user stickiness with high quality content; 3. Improve functional positioning, strengthen interaction between government and puclic and multi-media interaction; 4. Improve the awareness of participation, actively participate the interaction between the government and the public through more channels.