In recent years, the tourism industry was one of the first sectors to be seriously affected by the New Crown epidemic. Therefore, in the post-epidemic era, China has introduced a series of policies to promote tourism consumption. Based on a multiple streams perspective, this paper explores the internal logic behind the formulation of tourism consumption policies by taking Harbin City as an example, which involves issues, policies, and political perspectives. The study finds that there are problems, policies, and politics behind the formulation of a policy and the setting of an agenda at the social level. Problem streams such as the single structure of tourism consumption and poor service quality are the main sources of policy change; the research results of experts and scholars are the policy stream of policy change; and social opinion and the direction of national sentiment are the political stream of policy change. The three streams converge at a certain point in time and open the window of policy. To further promote the development and improvement of the tourism consumption market, Harbin City should establish a sense of the problem and adhere to the problem orientation in the future; widely solicit suggestions and adhere to the policy formulation from multiple angles; and uphold the concept of service and create a good public opinion environment.