Auxiliary power supply optimization device of Internet of Things meter

The utility model discloses an auxiliary power supply optimization device of an Internet of Things meter. The auxiliary power supply optimization device comprises a protection circuit, a filter circuit, a rectification voltage stabilizing circuit, a valley filling circuit, a switching power supply circuit, a DC conversion circuit and a feedback circuit. The filter circuit is electrically connected with a protection circuit and a rectification voltage stabilizing circuit through wires, the protection circuit is connected with an auxiliary power supply through a wire, the rectification voltage stabilizing circuit is in electrical input connection with a valley filling circuit through a wire, and the valley filling circuit is in electrical input connection with a switching power supply circuit through a wire. The switching power supply circuit is in electrical input connection with a direct current conversion circuit and a feedback circuit through wires, and the direct current conversion circuit is electrically