The invention belongs to a magnetic antenna for high-speed aircraft navigation and communication, which comprises a columnar spiral antenna, a closed antenna cover, a strong magnet ground plate and a conical coaxial feeding wire column. In the magnetic antenna, the spiral antenna of an axial mode is adopted, the antenna and a strong permanent magnet are integrated, the magnet serves as a magnetic field generator to generate a high permanent field and also serves as the antenna ground plate, when magnetic field intensity B is more than or equal to 0.5T, signal emitted by the spiral antenna can effectively penetrate a plasma, when the magnetic field of the permanent magnet is increased to 1.0T, antenna gain is increased to 9.6dB and approaches 10.6dB of the antenna gain in air, and the attenuation of electromagnetic wave during transmission in the plasma is reduced by 30dB. Therefore, the magnetic antenna has the characteristics of frequency bandwidth, circular polarization bandwidth, low attenuation amplitude of the electromagnetic wave of the antenna and the like, the antenna gain and the penetrability of the plasma are effectively improved, and the defect of communication interrupt caused by the existence of a surface plasma sheath in a background technology is overcome.