The construction iteration of urban comprehensive logistics hubs has gradually shown characteristics such as deep professionalism, multiple comprehensive functions, and strong economies of scale. The comprehensive logistics park built on railway stations has added a mode of intermodal transportation between public and rail, which can reduce transportation costs to a certain extent; but rail lines often result in the division of the interface between the park and the external city, forming a 'transportation island'. Therefore, the transportation characteristics and freight demand of the new railway logistics hub area are complex and special. Taking the transportation research of "Doudian Logistics Base" in Fangshan District, Beijing as an example, this article explores the transportation demand forecasting method and road traffic planning of the railway logistics hub area.