By building a virtual network topology named P2P overlay network on top of internet's physics topology layer based on P2P computing mode, a full-decentralized internet based self-organizing network routing model- Hierarchical Aggregation Self-organizing Network (HASN) is built effectively. The target and architecture of HASN routing model are described in this paper, as well as a detailed description of a P2P decentralized naming, route discovering and updating algorithm-HASN Scale. Simulation results testify the performance of HASN routing model.