Abstract: Aiming at the important safety problem brought by the P2P application of campus network, the paper establishes a intelligent tracing system based on P2P security, achieves the identity track, behavior track, real-time track and feedback track of P2P users, properly solves various potential safety hazards brought by the dynamics of P2P users, the open of resource sharing as well as the randomness of user operation, thus efficiently improving the safety and reliability of the P2P application of campus network.

Key words: P2P applications, safety hazards, tracing system