A power system of a hybrid power vehicle, comprising: an engine, outputting power to a wheel of the hybrid power vehicle through a clutch; a power motor, configured to output driving force to the wheel of the hybrid power vehicle; a power battery, configured to supply power to the power motor; a DC-DC converter; characterized in the power system further comprising: an auxiliary motor, connected with the engine and respectively connected with the power motor, the DC-DC converter, and the power battery; and a voltage stabilizing circuit, connected between the auxiliary motor and the DC-DC converter and configured to perform voltage stabilizing treatment on the DC output to the DC-DC converter when the auxiliary motor generates power, wherein the auxiliary motor comprises an auxiliary motor controller, the auxiliary motor controller comprises an inverter and an adjuster, and the adjuster is configured to output a first adjusting signal and a second adjusting signal according to an output signal of the voltage stabilizing circuit when the power battery is disconnected from the DC-DC converter to stabilize the DC bus voltage output by the inverter, wherein the first adjusting signal is configured to adjust the d-axis current of the auxiliary motor, and the second adjusting signal is configured to adjust the q-axis current of the auxiliary motor, wherein the inverter of the auxiliary motor controller has a first DC end, and the DC-DC converter has a third DC end and a fourth DC end; the first DC end of the auxiliary motor controller is connected with the third DC end of the DC-DC converter through the voltage stabilizing circuit; the fourth DC end of the DC-DC converter is connected with electric equipment and configured to supply power to the electrical equipment. an engine, outputting power to a wheel of the hybrid power vehicle through a clutch; a power motor, configured to output driving force to the wheel of the hybrid power vehicle; a power battery, configured to supply power to the power motor; a DC-DC converter; characterized in the power system further comprising: an auxiliary motor, connected with the engine and respectively connected with the power motor, the DC-DC converter, and the power battery; and a voltage stabilizing circuit, connected between the auxiliary motor and the DC-DC converter and configured to perform voltage stabilizing treatment on the DC output to the DC-DC converter when the auxiliary motor generates power, wherein the auxiliary motor comprises an auxiliary motor controller, the auxiliary motor controller comprises an inverter and an adjuster, and the adjuster is configured to output a first adjusting signal and a second adjusting signal according to an output signal of the voltage stabilizing circuit when the power battery is disconnected from the DC-DC converter to stabilize the DC bus voltage output by the inverter, wherein the first adjusting signal is configured to adjust the d-axis current of the auxiliary motor, and the second adjusting signal is configured to adjust the q-axis current of the auxiliary motor, wherein the inverter of the auxiliary motor controller has a first DC end, and the DC-DC converter has a third DC end and a fourth DC end; the first DC end of the auxiliary motor controller is connected with the third DC end of the DC-DC converter through the voltage stabilizing circuit; the fourth DC end of the DC-DC converter is connected with electric equipment and configured to supply power to the electrical equipment. an auxiliary motor, connected with the engine and respectively connected with the power motor, the DC-DC converter, and the power battery; and a voltage stabilizing circuit, connected between the auxiliary motor and the DC-DC converter and configured to perform voltage stabilizing treatment on the DC output to the DC-DC converter when the auxiliary motor generates power, wherein the auxiliary motor comprises an auxiliary motor controller, the auxiliary motor controller comprises an inverter and an adjuster, and the adjuster is configured to output a first adjusting signal and a second adjusting signal according to an output signal of the voltage stabilizing circuit when the power battery is disconnected from the DC-DC converter to stabilize the DC bus voltage output by the inverter, wherein the first adjusting signal is configured to adjust the d-axis current of the auxiliary motor, and the second adjusting signal is configured to adjust the q-axis current of the auxiliary motor, wherein the inverter of the auxiliary motor controller has a first DC end, and the DC-DC converter has a third DC end and a fourth DC end; the first DC end of the auxiliary motor controller is connected with the third DC end of the DC-DC converter through the voltage stabilizing circuit; the fourth DC end of the DC-DC converter is connected with electric equipment and configured to supply power to the electrical equipment.