Abstract: A subway project was taken as an example to make the load calculation and design and to analyze the internal forces by building a three-dimensional numerical model. On this basis, the strength and stability of the member bars with larger internal forces  were checked and then the internal forces of the selected typical parts were monitored. The results showed that the system can reliably withstand bi-directional loads, the construction speed and sequence should be controlled. In the course of calculation and analysis, the impact of the initial imperfection in the support system on the stability bearing capacity can be simulated by applying imaginary horizontal forces. The results were close to the experimental values. The research result can provide some references to the similar projects.