The invention discloses a three-terminal voltage-stabilizing inverter power supply used for charging and based on a voltage detection circuit. The three-terminal voltage-stabilizing inverter power supply is mainly formed by a control chip U2, a transformer T, a diode rectifier U1, a bidirectional switch S, a storage battery J, a polar capacitor C1, a polar capacitor C13, a polar capacitor C12, a polar capacitor C11, a voltage detection circuit, a three-terminal voltage stabilizing circuit, a boost adjusting circuit and a nonlinear amplifying circuit and the like. The boost adjusting circuit is connected with a CHRG1 pin, a CHRG2 pin and a PROG pin of the control chip U2, and the nonlinear amplifying circuit is connected with the boost adjusting circuit, a a contact of the bidirectional switch S and a primary side inductance coil of the transformer T. The three-terminal voltage-stabilizing inverter power supply used for charging and based on the voltage detection circuit can eliminate or restrain interference surge in the output current, the ability of the three-terminal voltage-stabilizing inverter power supply to restrain the pulsation of the output current can be effectively improved, and the output current can keeps stable.