The application relates to a double-power-source change-over switch which comprises a load-side phase line pole, a first phase line switch, a second phase line switch, a load-side neutral pole, a first neutral line switch, and a second neutral line switch. When the first phase line switch and the second phase line switch are switched off, at least one of the first neutral line switch and the second neutral line switch is switched on. When a second power source starts power supply, the second neutral line switch is switched on earlier than the second phase line switch, and the first neutral line switch is switched off just before the second phase line switch is switched on. When a first power source starts power supply, the first neutral line switch is switched on earlier than the first phase line switch, and the second neutral line switch is switched off just before the first phase line switch is switched on. The double-power-source change-over switch is applicable to an occasion with strict requirement for continuous power supply.