Scenic byway is a new corridor cross administrative region spatial carrier with complex functions of transportation, ecology, recreation, and culture. The large spatial span makes Scenic byway face governance problems such as crossing Administrative Region institutional barriers. Through literature review, on-the-spot investigation, induction and summary, this paper finds that cross-district scenic byways have: (1) The characteristics of giant corridor form, multi-level spatial elements, two-dimensional spatial management scale and multiple spatial subjects. (2) The development and protection of multi type resources, the game of management power, and the unclear division of rights, responsibilities, and interests among multi-subject. (3) Cross region, cross department, cross subject and other multicategory "cross-border" Governance Dilemma. By introducing the concept of space governance, the principles, objectives, subjects, and contents of Scenic byway governance across administrative regions are clarified based on the logic of "problem objective countermeasure", and the space governance system with the sub objectives of "consensus system of Space justice", "space platform-based management and control process" and "consultation mechanism of space community" is attempted to be constructed. Taking the "National No. 1 Scenic Byway" in Chengde as an example, put forward such countermeasures as legislation and regulation, building a composite space consensus system, establishing a control process, clarifying space powers, and establishing a multi-subject negotiation mechanism, to achieve the goal of cross administrative Scenic byway space governance through a set of laws and regulations, a set of control processes, and a set of mechanisms. In order to provide a research perspective for the spatial governance paradigm of scenic byways across administrative regions, and provide a practical basis for the proposed coordinated development strategy of typical corridor spatial regions.