Abstract: In the distribution network operation scenario, terminals are widely distributed, and some services will be carried through wireless communication or public networks. The network openness is enhanced, and security risks are intensified. The application of quantum cryptography can greatly improve the security of communication channels, but there are still practical challenges in terms of massive terminal access. To solve this problem, this paper studies the application architecture of lightweight and low-cost quantum cryptography technology, which can realize flexible and convenient access to mass wireless terminals through quantum edge nodes. On this basis, the application prospect of this scheme in typical distribution network operation business scenarios is discussed.