In unstructured P2P network, mismatch between logical topology and physical topology cause communication latency increasing and network load heaving. Consider the position and attribute of peers, the issues proposed a three layers mixed P2P network model. In the model, neighbor peers form domain, peers with the similar character compose groups in every domain. In the third layer of model, resource routing table is introduced to performance resource searching cross-domain. Simultaneously, P2P network dynamic adaptability is described detaily. Simulation result show the model can effectively shorten resource search delay and reduce the network load.