The invention discloses a transiently-responding improved circuit for a low-dropout linear regulator. The transiently-responding improved circuit comprises a first PMOS tube P1, a second PMOS tube P2,a third PMOS tube P3, a fourth PMOS tube P4, a fifth PMOS tube Mp, a first NMOS tube N1, a second NMOS tube N2, a third NMOS tube N3, a fourth NMOS tube N4, a fifth NMOS tube N5, a first resistor R1,a second resistor R2, a third resistor RL, a first capacitor CL, a first voltage Vn1, a second voltage Vn2, a third voltage Vpu, a fourth voltage Vpd, a first current I1, a second current I2, a thirdcurrent I3, a fourth current I4, a first input voltage Vin, a first output voltage Vout and a first ground GND. The transient response of the LDO is improved, and overshoot and undershoot are automatically reduced according to a circuit state. A transistor of the transiently-responding improved circuit works in a stable state in a cutoff zone, the static current can be effectively reduced, and the efficiency of a power supply can be improved. The transiently-responding improved circuit adopts common electronic devices and is simple and low in cost.