The invention discloses a single-stage AC-DC voltage stabilizer for wireless charging. The single-stage AC-DC voltage stabilizer comprises an inductor L, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R, field-effect transistors (M1, M2, M3 and M4), comparators (CMP1, CMP2 and CMP3), an error amplifier EA, a voltage sensing circuit, a digital controller, a starting circuit and a triangular wave generator. The AC-DC voltage stabilizer is provided with the four field-effect transistors to replace a traditional full-bridge rectifier composed of four diodes; the voltage stabilizer is combined with a control circuit so that the voltage stabilizer can work in a charging mode and can also work in a zero-modulus work mode; a load is no longer charged in the zero-modulus work mode, a follow current channel is formed at the receiving end, can reflect a high equivalent impedance to limit the current of the emitting end, and the power loss under the zero modulus is greatly reduced. The voltage stabilizer omits a traditional communication module and a secondary DC-DC converter, and the efficiency is greatly improved.