The present application relates to an antenna assembly, comprising a first antenna, a second antenna, a first coil, and a first tuning piece. The first antenna comprises a first radiator section; the second antenna comprises a second radiator section; the first coil comprises a first end, a second end, and a coil body wound in a plurality of turns; the first radiator section is electrically connected between the first end and an NFC feed circuit; the second radiator section is electrically connected between the second end and the ground; the two ends of the first tuning piece are respectively connected to the first end and the second end; the first radiator section, the first coil, and the second radiator section together constitute an NFC antenna; a parallel circuit formed by the first tuning piece and the coil body is used for isolating a signal of the NFC antenna from signals of the first antenna and the second antenna. The present application further provides a mobile terminal. By means of the present application, an NFC antenna can be integrated with multiple antennas, the internal space of a mobile terminal can be effectively used, and the signal strength of the NFC antenna is improved.