In recent years, by the influence of social progress and economic development, jewelry customers have continued to expand the demand gap. Today’s requirements for jewelry design are also more stringent than other design work. Excellent design should be a combination of natural beauty, spiritual beauty, and functional beauty. With the development of the computer industry and the advent of the information age, the design industry has undergone radical changes, and the way of design realization is gradually divided into hand-drawn design and computer-aided design. Although the hand-drawn design is beautiful and free, it is inaccurate and time-consuming. Computer-aided design is fast, accurate, and efficient, and the effect is real and fantasy, which is an important way to improve designers’ design efficiency. In order to address the problem of missing design results due to the weakness of details in the construction of 3D models in the original jewelry 3D design method. In this paper, the Grasshopper parametric design platform is used to prepare a program for the rapid modeling of spatial grid structures, and the details of how the program converts architectural models into SAP2000 structural analysis models are presented. Considering the large amount of work required to construct the surface cells for load application, a secondary masking program based on azimuth calculation is developed further to improve the modeling efficiency and universality of the program. Through an engineering example application, the effectiveness and practicality of the fast modeling program for spatial grid structures are verified, which provides a reference for structural engineers to develop similar programs to improve the modeling and analysis efficiency of complex structures and complete the programming application of contemporary jewelry design forms of Grasshopper software.