The function characteristics and the realization modes of dynamics modeling based on virtual assembly for integrated transmission are analyzed. On this basis, the system architecture and analysis process of dynamics modeling system for the dynamics modeling based on virtual assembly for integrated transmission are proposed. According to the architecture, the system is divided into the human-computer interaction, functional implementation, core analysis and data supporting layer, and the complete system architecture is established. The dynamics modeling process is divided into the modeling of multi-attribute parts, system modeling based on assembly features, dynamics modeling and system implementation stage from the analysis process. These can provide the systematic, integrated and practical basis for the dynamics modeling and establishment for modeling platform.