The utility model discloses a solid rotor magnetic pole structure, belonging to the technical field of permanent magnet synchronous motors. A magnetic pole iron core and a magnet yoke sleeve are fixed through an axial slot and a protruding part on one face where the magnetic pole iron core and the magnet yoke sleeve are mutually contacted. The axial slot and the protruding part have matched shapes and are arranged along the axial direction of a rotating shaft of the rotor. The axial slot is arranged on the interior surface of the magnetic pole iron core or on the exterior surface of the magnet yoke sleeve. Correspondingly, the protruding part is arranged on the exterior surface of the magnet yoke sleeve or on the interior surface of the magnetic pole iron core. After the magnetic pole iron core and the magnet yoke sleeve are installed in place, the protruding part is positioned inside the matched axial slot. The bottom of the axial slot is wider than the opening of the slot. The top of the protruding part is wider than the bottom of the protruding part. The structure provided by the utility model has the characteristics of large contact area, strong anti-deforming ability, accuracy positioning, high connection strength and the like, and achieves good prospects for production, manufacturing and popularization of a high-voltage permanent magnet motor.