The invention relates to a real-time clock driving circuit which is used for providing a driving power supply for a real-time clock generator of a digital camera. The real-time clock driving circuit comprises a flashlight circuit, a switching circuit and a main power supply, wherein the flashlight circuit comprises a transformer, a flashlight charging capacitor and at least one first divider resistance; the switching circuit comprises a transistor and a second divider resistance; the main power supply is respectively connected electrically to the transformer, the grid electrode of the transistor and the power input end of the real-time clock generator; the flashlight charging capacitor and one end of the at least one first divider resistance are respectively connected electrically to the output end of the transformer; the other end of the at least one first divider resistance is connected electrically to the source electrode of the transistor and is connected electrically to the grid electrode of the transistor through the second divider resistance; and the drain electrode of the transistor is connected electrically to the power input end of the real-time clock generator.