量子信息论的研究是量子理论和经典信息论的一个重要交叉领域 ,量子位不可复制且量子纠缠态不可区分的量子信息特征提供了一种理论上绝对安全的加密术一量子加密。本文对量子密钥分发协议进行了研究 ,利用点点间量子密钥分发协议和基于传统密钥托管方案 ,提出多用户、多控制中心网络环境下量子密钥的分发过程 The research of quantum information theory is an important cross field of quantum theory and classical information theory. Quantum information features that the quantum bits can not be copied and the indivisible state of quantum entanglement provide a theoretically absolutely secure encryption-quantum cryptography. In this paper, the quantum key distribution protocol is studied. By using the quantum key distribution protocol between dots and the traditional key escrow scheme, the quantum key distribution process in multi-user and multi-control center network is proposed