The main methods to reduce the no-load eddy current loss of permanent magnets of axial magnetic field motors include: reducing the width of the stator slot opening, increasing the length of the air gap, dividing the permanent magnet into blocks, using shielding layers and magnetic slot wedges, etc. Based on a simplified 2D analysis model of a permanent magnet axial field motor, the effects of reducing stator slot opening width and increasing air gap length, using shielding layers and magnetic slot wedges to reduce no-load eddy current losses are analyzed. The effects of different segmentation methods of permanent magnets on reducing noload eddy current losses are studied through three-dimensional electromagnetic field simulation. The research results indicate that reducing the width of the stator slot opening has the best effect; although increasing the length of the air gap can significantly reduce eddy current losses, the amount of permanent magnets used increases rapidly; the segmented permanent magnet has a better effect on reducing eddy currents, and the circumferential segmentation method is the best; the shielding layer has a counterproductive effect; the effect of using segmented magnetic slot wedges is slightly worse than reducing the width of stator slot openings, but the processing technology difficulty is lower.