The invention belongs to the technical field of communication, and discloses an NFC antenna power taking device comprising an antenna, a rectifying module, an energy storage module and a current adjusting module; the antenna converts a received electromagnetic energy into a first voltage, the rectifying module rectifies the first voltage to obtain a second voltage, the second voltage charges the energy storage module through the current adjusting module, the current adjusting module adjusts a charging current, when the second voltage is in the tendency of becoming weak because of reduction ofan electromagnetic field, the energy storage module maintains a power supply stable through discharging outwards so as to guarantee regular work of circuits; so, while a relatively large-capacity energy storage module is used, a problem of too much load in an NFC field caused by that the energy storage module obtains too much energy at the moment when an NFC device enters the field is avoided, thus, the NFC device is enabled to perform regular communication and can be identified by an NFC reader and keep steady work.