The primary and secondary truss, inclined elliptical section steel column, steel pipe lattice type inclined column, single-layer ellipsoidal shell and fisheye structure together to form a complex of large span station buildings. In order to further understand the mechanical properties of the structure, the test model of the structure was designed and the model of static loading test was completed. The model design process, basic unit of structure in vertical interception, which covers the main structural characteristics of the roof, and made 1 to 20 large scaled model. In the model design, the similarity ratio of each parameter is determined, and then the support condition between the roof structure and the lower structure is simulated. In order to verify the rationality of the scale model, the actual model and test the model using the finite element software to verify the similarity principle. The verification results show that the scale structure model can the basic mechanical behavior of the actual structure of the reaction. The research results of this paper can provide reference for the design and manufacture of similar engineering model test.