The invention relates to a power supply switcher, which comprises a drive mechanism, a switch block, and a connecting pole plate, wherein the connecting pole plate is matched with the switch block and electrically connected with a load of an external device; the drive mechanism comprises a drive device and a drive draw bar; the drive device is assembled on a support seat; two ends of the drive draw bar are respectively connected with the drive device and the switch block; the switch block is connected with the connecting pole plate in fit; the connecting pole plate comprises two connection ends, and a first connecting pole plate and a second connecting pole plate, which are mutually insulated; a fracture structure is arranged on the second connecting pole plate, and matched with the switch block to control on / off; different connection ends are selected, and the connection ends at the same sides of the first connecting pole plate and the second connecting pole plate are electrically connected with different frequencies of loads of the external device respectively. The power supply switcher is simple in structure, reasonable in layout, small in volume, low in cost, high in power supply switching efficiency, and good in effect; stable and reliable switching of the power supply can be achieved, and the device also can be effectively prevented from being damaged.