The utility model relates to a phase-shifting feed device, which comprises a metal cavity, a phase-shifting circuit and a feed network board. And the metal cavity is attached to the substrate, and thecommon-ground arrangement of the metal cavity and the feed network board is realized by welding the side wall of the metal cavity with the grounding bonding pad. Therefore, the metal cavity is attached to the feed network board, the thickness can be reduced, and no additional fastener is needed for connection. Moreover, the signal terminal can be led out from the interior along the vertical direction through the avoidance window so as to electrically connect the phase-shift circuit with the feed line, so that wiring from the side surface of the phase-shift feed device is avoided, and the layout of the phase-shift feed device is enabled to be more compact. Therefore, the size of the phase-shifting feed device is reduced, the structure is simplified, and the miniaturization of the base station antenna is facilitated. In addition, the utility model also provides a base station antenna.