Abstract: Based on the analysis of the shortcomings of the existing railway station and yard professional aided design software, according to the professional design characteristics of railway station and yard, this article studied on the requirement analysis, frame structure, software process, proposed 3D space model based railway station and yard horizontal and vertical integration design pattern. This design pattern was to build 3D space model of railway station and yard equipment, bidirectionally and dynamicly refresh the railway station yard equipment of 3D data and design visual angle data, implement the horizontal and vertical linkage modification in the process of railway station and yard design, improve the design efficiency and design quality.