An antenna, comprising: a Printed Circuit Board, PCB, a first main antenna, a second main antenna, a metal connection component(31,32) and a parasitic unit, wherein the first main antenna is printed on the PCB, and the second main antenna is configured outside the PCB, and electrically connected to the first main antenna through the metal connection component(31,32), wherein the second main antenna is configured to be supported on a support of a terminal device where the antenna is located or configured to be supported on a housing of a terminal device where the antenna is located; characterized in that: the antenna comprises a parasitic unit, wherein the parasitic unit is configured to be supported on the support of the terminal device where the antenna is located or configured to be supported on the housing of the terminal device where the antenna is located, is located on the same side of the support as the second main antenna, has a gap with the second main antenna, and is connected to the ground wire; the second main antenna comprises a feed part, which is connected to the antenna feed unit; the second main antenna comprises a main section of the second main antenna and an auxiliary section of the second main antenna which are independent from each other, the main section of the second main antenna comprises the feed part and is connected to the antenna feed unit and the first main antenna, and the auxiliary section of the second main antenna is connected to the first main antenna; the metal connection component comprises a first copper exposure area and a second copper exposure area configured on the first main antenna and a first metal elastic pin and a second metal elastic pin; the first copper exposure area is at an upper left corner of the first main antenna, the second copper exposure area is at an upper right corner of the first main antenna; wherein, a first end of the metal elastic pin keeps electrical connection with the first copper exposure area in a welding manner, a second end of the metal elastic pin keeps electrical connection with the main section of the second main antenna above the second end of the metal elastic pin; a first end of the second metal elastic pin keeps electrical connection with the second copper exposure area in a welding manner, and a second end of the second metal elastic pin keeps electrical connection with the auxiliary section of the second main antenna above the second end of the second metal elastic pin. the antenna comprises a parasitic unit, wherein the parasitic unit is configured to be supported on the support of the terminal device where the antenna is located or configured to be supported on the housing of the terminal device where the antenna is located, is located on the same side of the support as the second main antenna, has a gap with the second main antenna, and is connected to the ground wire; the second main antenna comprises a feed part, which is connected to the antenna feed unit; the second main antenna comprises a main section of the second main antenna and an auxiliary section of the second main antenna which are independent from each other, the main section of the second main antenna comprises the feed part and is connected to the antenna feed unit and the first main antenna, and the auxiliary section of the second main antenna is connected to the first main antenna; the metal connection component comprises a first copper exposure area and a second copper exposure area configured on the first main antenna and a first metal elastic pin and a second metal elastic pin; the first copper exposure area is at an upper left corner of the first main antenna, the second copper exposure area is at an upper right corner of the first main antenna; wherein, a first end of the metal elastic pin keeps electrical connection with the first copper exposure area in a welding manner, a second end of the metal elastic pin keeps electrical connection with the main section of the second main antenna above the second end of the metal elastic pin; a first end of the second metal elastic pin keeps electrical connection with the second copper exposure area in a welding manner, and a second end of the second metal elastic pin keeps electrical connection with the auxiliary section of the second main antenna above the second end of the second metal elastic pin.