Abstract: With the continuous expansion of network scale,the characteristics of hierarchical and modular network structures are increasingly prominent.Traditional single-layer network research paradigm has some limitations in representing the complex relationships among various network systems.The characteristic analysis and model construction of multilayer networks have gradually become an important direction of complex network research.Aiming at the characteristics of multilayer network structure presented in the application of Internet,this paper puts forward the multilayer network model for the Internet and the significance of constructing a multilayer network model in the field of Internet.By analyzing the characteristics of Internet data,this paper designs a multilayer network model covering three types of networks,namely,the Internet infrastructure layer,the business application layer,and the user account layer.This paper proposes a heuristic single-layer network generation model to solve the problem that the current network generation model based on node degree cannot describe the distribution of network cores.Based on the generation model of a single-layer network,the interlayer association method of a multilayer network is designed to realize the model construction of a multilayer network.

Key words: Internet, Heuristic, Core distribution, Multilayer network, Model construction