A cross-center quantum identity authenticatin scheme was proposed.Which was based on teleportation and quantum entanglement swapping in quantum optics.In a distributed network,the proposed scheme was realized by transmitting information in quantum channel using shared EPR pairs and exchanging necessary information in classical channel at the same time.The security of this scheme,which is guaranteed by quantum mechanism,is unconditional as the EPR quantum key distribution protocol.Compare with previous schemes,the proposed scheme overcomes some disadvantages of those simple point-to-point quantum identity authentication scheme.Because of the characteristic of cross-center extending the authentication range,the proposed scheme is more flexible and practical.