paper With the development of computer technology and finite element structural analysis theory and computer graphics, vehicle structural design become increasingly dependent on computer-aided design, especially in large and complex structures, computer provide more convenient and accurate tools to designers to solve engineering problems .The main purpose of this paper is to use 3D modeling software proe and finite element analysis software Ansys workbench static analysis and modal analysis of a missile combination cabin and learn how to use computer-aided design to design the aircraft structure. This work is divided into four steps, the first step is using proe software to model the missile combination cabin and assemble the components; The second step to import the into the workbench,and prepare for the next analysis.;The third step, to solve the model’s modal analysis and static analysis;The fourth step, analysis the results and obtain the data.