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For space flight control system features, the article compares the application of the three kinds of topology structure. And research the aspects of the function and the actual demand of specific application is not tightly combined. A type of optical fiber communication protocol of the field of aerospace distributed control is proposed. The functions of the framework agreement, the topology and data formats is described in details. In this paper a platform based on FPGA is built to realize the communication protocol, The workflow and the state machine design is focusing described. The simulation results of multipoint communication is given out at last. The article promotes the application of optical fiber in space.