Abstract: Considering that the space command and control network is the main carrier of information and the network performance directly a ects the real-time and e ectiveness of command and control transmission, this paper summarizes a three-layer structure of the space command and control network system, and analyzes the status of the space-based accusation network. Then, four challenges about network architecture, network security, network protocol and network orchestration are proposed, as well as relevant technical solutions, which are expected to provide technical references and research directions for the space command and control network architecture.