This study proposes a vector-based complex network modeling method on the basis of the relevant traditional method, which can model the entire complex system according to the heterogeneity of nodes. Depending on business characteristics, different business networks are modeled by virtue of the idea of hierarchical modeling, and business-driven complex system modeling algorithms are used for the networking of different networks. The network splitting algorithm is used for partial splitting of complex systems to analyze local performance. The proposed method not only reduces the complexity of modeling but also enriches the expressive ability of the model, which is of great significance to the analysis of complex systems. Finally, a smart grid is taken as an example to verify the effectiveness of the method.