The invention discloses a magnetic pole fixing device of a permanent magnet wind power generator and the permanent magnet wind power generator. The magnetic pole fixing device of the permanent magnetwind power generator comprises a plurality of first fixed block assemblies, a plurality of second fixed block assemblies and a plurality of radial limiting assemblies. Each first fixed block assemblycomprises a plurality of first fixed blocks arranged at intervals along the axial direction of a rotor, and each second fixed block assembly is arranged on the two side faces of the magnetic pole module. The two adjacent first fixed block assemblies are used for limiting the movement of the magnetic pole module contained in the two adjacent first fixed block assemblies in the circumferential direction of the rotor, the first fixed block assemblies and the second fixing block assemblies are matched to limit the movement of the magnetic pole module in the axial direction of the rotor, and the radial limiting assemblies are used for limiting the movement of the magnetic pole module in the radial direction of the rotor. According to the magnetic pole fixing device of a permanent magnet wind power generator and the permanent magnet wind power generator, the defects that the installation difficulty of the magnetic pole module in the prior art is large, and the long-term reliability of the magnetic pole module fixing device is low are effectively overcome.