Abstract: In response to the problems of large scale resource occupation, multiple types of facilities and equipment, frequent and complex scheduling operations, and lack of systematic management of internal resources in railway freight station yard, this paper designed a railway freight station yard resource visualization system based on digital twins. The paper elaborated on the principles and architecture of digital twin application based on the actual needs of station yard resource management. Through key technologies such as refined modeling and simulation, interaction and collaboration, data fusion and analysis, it implemented the maintenance and management of station container spaces, cargo spaces, tracks, vehicles, and other information. The application shows that the system can enhance the collaboration and data sharing ability among internal resources in the railway freight station yard, which helps to improve the operating efficiency and management level of the railway freight station yard.