Meter power failure detection circuit

The utility model relates to a meter power failure detection circuit, which is characterized by comprising a first voltage division circuit provided with a first input end connected with a first power supply, a grounded second input end and a first output end; the first switching device is connected with the first output end of the first voltage division circuit; the second voltage division circuit is provided with a third input end connected with the first switching device, a fourth input end connected with a second power supply and a second output end; the second switch device is connected with a fourth input end of the second voltage division circuit and a second output end of the second voltage division circuit, and the third voltage division circuit is provided with a fifth input end connected with the second switch device, a grounded sixth input end and a third output end. And a third output end of the third voltage division circuit is correspondingly a power failure detection port. The power failure de