This paper proposes a method of P2P validation based on CDN network, which can solve the problem of user verification in P2P network effectively. The realization process is as follows. Firstly, the system architecture of P2P network is analyzed, and then the P2P verified principle based on CDN network is discussed. Finally, the P2P verified process is extracted based on CDN network. It shows that the method proposed in this paper cannot only solve the problem of user verification in P2P network but also improves the efficiency and accuracy of verification.