Abstract: The power router will occupy a central position in the future energy Internet with microgrid as the basic unit. To address the problems of single function and low flexibility of the power router using customized design, this paper investigates the power router using software-defined technology, adopts digital real-time simulation and modular converter fusion technology to realise the design and construction of a software-defined power router instrumented experimental platform, and through A practical case study of a nine-port power router is analysed and studied to demonstrate the effectiveness and feasibility of the solution. This approach provides a new paradigm for testing power routers for engineering implementation, enabling the design of power routers to evolve towards the "hardware modularity + functional software" model, and better promoting the intelligent and systematic development of future power routers.