Voltage compensating circuit and low dropout linear voltage stabilizer

The invention provides a voltage compensating circuit and a low dropout linear voltage stabilizer, wherein the voltage compensating circuit is connected to the low dropout linear voltage stabilizer; the voltage compensating circuit comprises a first operational amplifier, a second operational amplifier, a third operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor and a dynamic resistance unit; and a resistance value of the dynamic resistance unit is related with a current value at a first end of the dynamic resistance unit. The voltage compensating circuit can dynamically compensate a voltage at an output end of the low dropout linear voltage stabilizer according to a load condition, so that the output voltage is stabilized.