The invention discloses a loudspeaker with a novel double-magnetic structure. The loudspeaker comprises a first voice diaphragm, a second voice diaphragm, a first voice coil, a second voice coil, a first copper ring, a second copper ring, a first concentrating flux plate, a second concentrating flux plate, a third concentrating flux plate, a fourth concentrating flux plate, a first magnet, a second magnet, an annular connecting block, a support, tuning paper and a PCB. A first concentrating flux plate is arranged on the first magnet, a third concentrating flux plate is arranged below the firstmagnet, the second magnet is arranged on the periphery of the first magnet, and the first magnet and the second magnet are fixed through an annular connecting block. The invention follows the acoustic principle so that the structure is excellent. The key point is that upper and lower voice diaphragms simultaneously pronounce; the two voice diaphragms are matched in a large-small mode, the defectsof low frequency and high frequency can be overcome at the same time, the frequency response range of the loudspeaker is wider, meanwhile, the magnetic circuit design enables the magnetic field intensity of the two voice diaphragms to be higher, the support and the magnetic set part adopt the injection molding process, and therefore the electroacoustic performance is more excellent, the process is simplified, and consistency is better.