Electric energy meter carrier wave power supply protection circuit

The invention discloses an electric energy meter carrier wave power supply protection circuit which comprises a step-down transformer connected with an alternating current power grid and a rectification module, the rear end of the rectification module is connected with a plurality of divider resistors in parallel, one divider resistor is connected with a voltage monitoring chip in parallel, and the voltage monitoring chip is provided with a voltage threshold value. A corresponding high level or low level is output according to the relation between the voltage of the input end of the voltage monitoring chip and a set voltage threshold value, the output end of the voltage monitoring chip is connected with the enabling end of the voltage stabilizing chip, on-off of the voltage stabilizing chip is controlled according to the output of the voltage monitoring chip, and the input end of the voltage stabilizing chip is connected with the rectifying module. And when the liability at the rear end becomes larger and the