The invention relates to a low-power-consumption intelligent door lock. The low-power-consumption intelligent door lock comprises a door lock control MCU, a capacitance touch keyboard, a fingerprint sensor, a non-contact IC card antenna, a BLE module, a voice playing module, an OLED display screen, a door lock motor driving module, a battery capacity monitoring module and a door handle switch sensor, and further comprises a loudspeaker, a door lock motor and a battery. A low-power-consumption standby method comprises the steps that (1) the door lock is closed; (2) after 5 seconds, the BLE module, the voice playing module, the OLED display screen, the door lock motor driving module and the battery capacity monitoring module are turned off, and the capacitance touch keyboard, the fingerprintsensor and the non-contact IC card antenna are reserved to be turned on; (3) when the door lock control MCU monitors the situation that the door handle switch sensor does not transmit a signal for continuous 48 hours, the capacitance touch keyboard, the fingerprint sensor and the non-contact IC card antenna are turned off; (4) during door opening, the handle switch sensor transmits the signal tothe door lock control MCU, and the capacitance touch keyboard, the fingerprint sensor and the non-contact IC card antenna are turned on; and (5) the door lock is opened.