The invention discloses a reference voltage generating circuit applicable to a wide supply voltage range. The circuit includes an initial reference voltage generating circuit, a capacitance bleeder circuit, a first switch, a reset circuit, a reset circuit time delay control circuit, a second switch and a third switch; the initial reference voltage generating circuit is used for generating initialreference voltage; the capacitance bleeder circuit is used for generating capacitance reference voltage; the first switch is used for supplying electricity to the initial reference voltage generatingcircuit and the capacitance bleeder circuit when the circuit is powered on or after the reset operation is carried out; the reset circuit is used for resetting the initial reference voltage generatingcircuit and the capacitance bleeder circuit when it is detected that supply voltage enabling signals are frequently switched; the reset circuit time delay control circuit is used for generating switching detection signals to control the operation of the reset circuit when the supply voltage enabling signals are frequently switched since supply voltage is frequently switched between the low voltage and the high voltage; the second switch is used for outputting the initial reference voltage in a voltage division mode when the reference voltage needs to be refreshed after the initial reference voltage is generated; the third switch is used for enabling the initial reference voltage generating circuit to generate Vref before the reference voltage is refreshed, and switching off the initial reference voltage generating circuit after the refreshing operation is completed.