Structural modeling takes lots of time and energy of engineers, rapid structural modeling is one of the keys to raise the efficiency of structure design in the process of civil aircraft design. A method of rapid structure modeling for civil aircraft is proposed in this paper which is based on the secondary development technology of CATIA. Decompose frequently used part models into the combination of typical machining features based on analyzing and summarizing of the common civil aircraft structure model. Create a CATIA knowledge template for each feature, then, establish a structural feature template library to integrate all templates. In addition, CAA secondary development technology is used to design a visual interface which can call feature templates from the library. On this foundation, by simulating the material reduction process and calling the machining feature template one by one to create structure models. This method has been verified and applied in existing projects, which improves the efficiency and quality of structure modeling.