<p>Quantum communication provides us with a novel means of secure information transmission. Concurrently, there is a growing demand for multi-user quantum networks in tandem with the development of quantum communication devices. Given that most terrestrial quantum networks rely on optical fibers, the escalating user demand has rendered the cost and complexity of multi-fiber links critical issues that demand immediate attention. This article presents a duplex quantum communication link optimization scheme. This scheme significantly reduces the consumption of fiber link resources in duplex quantum communication systems, simplifies the deployment process, and cuts down costs. Based on this scheme, a corresponding experimental system was constructed and tested. The test results demonstrate that the scheme effectively simplifies the link without significantly compromising the performance of the original system.</p>