NFC electronic key-based authorized unlocking method capable of improving unlocking power

According to the unlocking method based on the NFC electronic key authorization and capable of improving the unlocking power, an electronic lock end master control system of a passive electronic lock comprises an NFC antenna, a driving module, an energy storage module, an NFC receiving module, a power module and a communication and control module, and an electronic key end of the passive electronic lock is provided with an NFC transmitting module, an anti-collision module, a comparison module and a delay module; the unlocking method for improving the unlocking power comprises four steps. Wireless signal interference brought by other NFC devices is reduced, work is more reliable, whether the NFC receiving and transmitting module is aligned or not is judged through the feed current sent by the electronic lock end so that maximum-efficiency energy charging of the power module can be achieved, and according to impedance information and power information of the NFC device, the power supply module can charge the NF