Disclosed is an antenna apparatus of a mobile terminal. An enclosed metal medium frame (10) with no break point comprises two side frames, a top frame and a bottom frame which are connected to form the frame shape. Two ends of the top frame are respectively connected to top ends of the two side frames, and two ends of the bottom frame are respectively connected to bottom ends of the two side frames. Two sides of a metal plate (11) are respectively connected to the two side frames of the metal medium frame seamlessly. The bottom side of the metal plate (11) and the bottom frame of the metal medium frame (10) form a first window (14). A first metal wiring (12) and a second metal wiring (13) are provided in the first window (14). The first metal wiring (12) is connected to the metal medium frame (10), and the second wiring (13) is connected to both the metal medium frame (10) and the metal plate (11). Also disclosed is a mobile terminal. The invention adopts a coupled feed-in mobile terminal antenna apparatus, thereby realizing a seamless antenna apparatus, avoiding the performance reduction of the antenna due to being held in a hand, and meanwhile enhancing the structural strength of a cell phone and improving the aesthetic sense.