An automatic medium-voltage dual-power-supply switching device includes an input module, an acquisition module, a control and communication module, an output module, and a power supply module. The acquisition module includes a plurality of voltage input channels and a plurality of current input channels. The input module is used for receiving a first switch amount signal. The acquisition module is used for acquiring information, including a voltage, frequency and current. The output module is used for outputting a second switch amount signal. The communication module is used for communicating with a peripheral equipment. The power supply module is used for supplying power to the input module, the acquisition module, the communication module and the output module. The switching device, which not only can measure a voltage signal, but also can measure a current signal, has extensible voltage input channels and current input channels at the same time. A touch screen can also display the acquired information in a graphic manner, which is intuitive and clear.
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