Abstract: A RF signal choking device includes: a first port electrically receiving direct current, RF signals, and antenna interface standards group (AISG) signals from a base station; a blocking capacitor being provided for blocking the direct current and the AISG signal and transmitting the RF signal; a second port connected to the other end of the blocking capacitor, for outputting the RF signal; a first inductor, one end of which is connected to the first port, for transmitting the AISG signal and the direct current; a modulator, one end of which is connected to the other end of the first inductor, for processing the AISG signal; a third port, which is connected to the other end of the modulator, for outputting the processed AISG signal; and a second inductor, one end of which is connected to the second port and the other end of which is connected to the ground.