Power circuit switching device and method, and internet of things equipment

The invention discloses a power circuit switching device and method, and internet of things equipment. The power circuit switching device comprises a DC/DC power circuit, a MOS power control circuit,a power isolation circuit, an LDO power circuit and a master control chip; a voltage output end of the DC-DC power circuit and the voltage output end of the MOS power control circuit are connected with the voltage input end of the power isolation circuit; the voltage output end of the power isolation circuit is connected with the voltage input end of the LDO power circuit; the voltage output end of the LDO power circuit is connected to the master control chip; and the DC-DC power circuit and the MOS power control circuit are connected with the master control chip through the GIPO. The equipment entire power consumption can be greatly reduced under the conditions of high power conversion efficiency in work of equipment and the low static current under the standby dormancy. 本发明公开了一种电源电路切换装置、方法和物联网设备，电源电路切换装置包括：DC-DC