The invention discloses a low-voltage bandgap reference circuit. The low-voltage bandgap reference circuit comprises a first MOS transistor, a second MOS transistor, a third MOS transistor, an operational amplifier, a first bipolar transistor, a second bipolar transistor, a resistor, a first capacitor, a second capacitor, a switching component and an enabling unit; the switching component accessestwo phase non-overlapping clock signals, when the phi 1 phase clock signal is a high level, the switching component makes the first capacitor and the second capacitor connected between a first node and an emitter of the second bipolar transistor in parallel, and when the phi 2 clock signal is a high level, the switching component makes the first capacitor and the second capacitor connected between the first node and a ground point in series. According to the low-voltage bandgap reference circuit, voltages of any two nodes do not need to be precisely the same, so that a high-gain operational amplifier is not needed, the design difficulty of the circuit can be lowered, power consumption of the circuit is very low, and the circuit is suitable for low power supply and low voltage applications. The invention further discloses a voltage generation circuit.