The present invention discloses an electronic tag circuit, which comprises a rectifying and regulating circuit, a voltage-limiting bleeder circuit, a power detection circuit and a voltage-stabilizing capacitor. The first input terminal of the rectifying and regulating circuit is used for receiving a first antenna signal. The second input terminal of the rectifying and regulating circuit is used for receiving a second antenna signal. The output terminal of the rectifying and regulating circuit is connected with the input terminal of the voltage-limiting bleeder circuit. The first control terminal of the voltage-limiting bleeder circuit is used for receiving the first antenna signal. The second control terminal of the voltage-limiting bleeder circuit is used for receiving the second antenna signal. The output terminal of the voltage-limiting bleeder circuit is connected with the first terminal of the voltage-stabilizing capacitor. The second terminal of the voltage-stabilizing capacitor is grounded. The input terminal of the power detection circuit is connected with the first terminal of the voltage-stabilizing capacitor. The output terminal of the power detection circuit is connected with the feedback terminal of the voltage-limiting bleeder circuit. The voltage-limiting bleeder circuit is used for conducting the voltage reduction treatment on the output voltage according to the feedback signal, the first antenna signal and the second antenna signal. The electronic tag circuit is simple and stable in structure, and eliminates the circuit emulation.