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To meet the requirements of the target spacecraft for rendezvous and docking, supporting reliable data transmission of different types, telemetry modes switching, and complicated data flow downlink, a multi-networks stage data handling method is proposed to support rendezvous and docking with various spaceships. Including network topology of the complex, docking bus protocol reuse, telemetry handling strategy and stage networks managing, combined with the software and hardware design, the data management solution is given from the system level. The method is able to guarantee either the reliability and safety of Spacelab, Manned Spaceship and Cargo Spaceship in stand-alone mode, or the flexibility and scalability of the data communication and management of the complex. After applied in the OBDH system of Spacelab, the method has been validated by the the long-time flight experiments of four rendezvous and docking complexes of Spacelab, Manned Spaceship and Cargo Spaceship.