Abstract: As a theoretically absolutely secure information transmission technology, quantum communication has received extensive attention from the global industry. In recent years, it has gradually moved from theory to practice,commercialization and industrialization.The United States, Japan, China, and Europe are among the top of the world in basic research and applied technology.The number of patents has grown rapidly.The number of applications in the early years of the United States and Japan were high. But in recent years, more and more patent applications have come from the Chinese. The
number of QKD patents is greater than the number of QT/QSS/QSDC patents. Because the application deployment of CV-QKDtechnology is less difficult thanDV-QKD，the CV-QKDpatent applications are more active. American innovation companies actively apply for patent applications and launch projects. Domestic research institutes, companies, and equipment manufacturers are actively conducting research on quantum communication.And the QKD-based quantum secure communication protocol, network and devices are themaindirection of patent innovation.

Key words: quantum communication, patent, quantumkey distribution, quantumteleportation