The invention relates to a quick-response low-dropout regulator. The quick-response low-dropout regulator comprises a band-gap reference, an operational amplifier, a feedback resistor string and a power tube, wherein the band-gap reference is used for generating reference voltage Vref and inputting the reference voltage to a negative input end of the operational amplifier, the feedback resistor string is connected with a positive input end of the operational amplifier, one end of the feedback resistor string is connected with a leak end of the power tube, the other end of the feedback resistor string is grounded, a source end of the power tube is connected with a power source VDD, and a grid end of the power tube is connected with the output end of the operational amplifier. The quick-response low-dropout regulator further comprises a reference voltage generation circuit, an NMOS (N-channel metal oxide semiconductor) transistor M1 and a PMOS (P-channel metal oxide semiconductor) transistor M2, wherein the input end of the reference voltage generation circuit is connected with the band-gap reference, the reference voltage generation circuit is used for generating reference voltage vbn and vbp. The quick-response low-dropout regulator solves the technical problem of high power consumption of an existing low-dropout regulator LDO, and too much voltage drop and overshoot is avoided by adding a part of auxiliary circuit.