An antenna assembly, comprising: a first antenna, a second antenna and a metal frame, wherein the metal frame comprises: a metal plate; and a first side frame, a second side frame, a top frame and a bottom frame which enclose the metal plate; wherein the first antenna is connected to a first radiation part of the bottom frame via a first connection point, the first radiation part is connected to the first side frame, the first side frame is separated from the metal plate by a slot, and the slot is opened on the metal frame between the first side frame and the metal plate; the second antenna is connected to a second radiation part of the bottom frame via a second connection point, the second radiation part being disconnected from the first radiation part and the second side frame, such that a first feed current flowing through the first antenna flows into the first radiation part via the first connection point, and flows into the first side frame and the metal plate via the first radiation part; wherein the first radiation part is configured to radiate an antenna signal under the action of the first feed current, and the first side frame and the metal plate are configured to produce resonance at the slot under the action of the first feed current; such that a second feed current flowing through the second antenna flows into the second radiation part via the second connection point, and wherein the second radiation part is configured to radiate an antenna signal under the action of the second feed current, characterized in that a length of the first radiation part is less than the length of the second radiation part; the first radiation part is configured to radiate an antenna signal at a high frequency band, and the second radiation part is configured to radiate an antenna signal at a medium and low frequency band; wherein the high frequency band ranges from 2,300 MHz to 2,700 MHz, and the medium and low frequency band ranges from 700 MHz to 2,100 MHz. the metal frame comprises: a metal plate; and a first side frame, a second side frame, a top frame and a bottom frame which enclose the metal plate; wherein the first antenna is connected to a first radiation part of the bottom frame via a first connection point, the first radiation part is connected to the first side frame, the first side frame is separated from the metal plate by a slot, and the slot is opened on the metal frame between the first side frame and the metal plate; the second antenna is connected to a second radiation part of the bottom frame via a second connection point, the second radiation part being disconnected from the first radiation part and the second side frame, such that a first feed current flowing through the first antenna flows into the first radiation part via the first connection point, and flows into the first side frame and the metal plate via the first radiation part; wherein the first radiation part is configured to radiate an antenna signal under the action of the first feed current, and the first side frame and the metal plate are configured to produce resonance at the slot under the action of the first feed current; such that a second feed current flowing through the second antenna flows into the second radiation part via the second connection point, and wherein the second radiation part is configured to radiate an antenna signal under the action of the second feed current, characterized in that a length of the first radiation part is less than the length of the second radiation part; the first radiation part is configured to radiate an antenna signal at a high frequency band, and the second radiation part is configured to radiate an antenna signal at a medium and low frequency band; wherein the high frequency band ranges from 2,300 MHz to 2,700 MHz, and the medium and low frequency band ranges from 700 MHz to 2,100 MHz.