Double-channel power supply switching device

The utility model provides a double-channel power supply switching device, which comprises two or more switching modules. Each switching module comprises two input ends, an output end and a parallel connection control end, each two corresponding input ends respectively receive a first power signal and a second power signal, each parallel connection control end transmits and receives parallel connection control signals, and the output ends of the two or more switching modules are mutually connected. The double-channel power supply switching device generates the parallel connection control signals for controlling the two or more switching modules according to detection results to a first power supply branch and a second power supply branch, when one switching module is in fault or a certain switching module is required to be maintained, the switching module is controlled to be withdrawn from a double-channel power supply system, the other switching modules complete double-channel power supply switching, and accordingly the double-channel power supply switching device can guarantee that the output state of the double-channel power supply system is not changed, and increases power supply reliability.