The invention discloses a low power consumptionlow differential voltage linear voltage regulator system. The system comprises alow power consumption benchmark circuit, an under-voltage locking circuit connected with the low power consumption benchmark circuit, a low differential voltage linear voltage regulator circuit connected with the low power consumption benchmark circuit and the under-voltage locking circuit respectively, wherein the low power consumption benchmark circuit outputs benchmark voltage signals to the under-voltage locking circuit, the low power consumption benchmark circuit outputs bias current signals and benchmark voltage signals to the low differential voltage linear voltage regulator circuit. The low power consumption low differential voltage linear voltage regulator system can substantially enhance the transient response performance of the LDO circuit.