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Aimed at the situation of high data rate and complex interface of payload equipment in the satellite, a high-speed routing scheme based on FPGA is designed in this paper. Key problems such as matrix switching, routing lookup, SDRAM arbitration access, reliability design of intra-satellite are solved. The scheme is modular designed with the characteristic of easy integration and expansion, which can be used to construct communication networks for various standard interfaces such as CAN, UART, LVDS. The concrete implementation and experimental verification of the scheme is given at the same time, which provide reference for the design on intra-satellite and inter-satellite routing.