The invention discloses a liquid crystal display panel driving circuit, a driving method and an electronic curtain. The circuit comprises a step-down conversion circuit, a first feedback circuit based on a negative feedback amplifier circuit and an output control circuit, wherein the step-down conversion circuit provides driving voltage for a liquid crystal display panel, and the output control circuit is used for switching on the first feedback circuit to be a feedback circuit for the step-down conversion circuit. By the aid of the circuit, the driving voltage within a lower voltage range can be provided, the step-down conversion circuit can provide sufficient power for the whole IC (integrated circuit) driven liquid crystal display panel, and the driving power requirements of the liquid crystal display panel of the electronic curtain can be met at low cost.