The invention discloses a novel permanent magnet bias single-degree-of-freedom axial magnetic bearing which comprises a stator and a rotor iron core. The stator comprises a left side stator iron core and a right side stator iron core. An annular permanent magnet is arranged between the left side stator iron core and the right side stator iron core. A magnetism isolation aluminum ring is arranged in the upper wall face of an annular cavity formed by the left side stator iron core, the right side stator iron core and the annular permanent magnet. The left side stator iron core and the right side stator iron core are each of an E-shaped structure. A control winding is manufactured in each stator groove in a winding manner. The novel permanent magnet bias single-degree-of-freedom axial magnetic bearing effectively overcomes the defects of an existing axial magnetic bearing, and the low-consumption single-degree-of-freedom axial magnetic bearing easy to control, manufacture and assemble and capable of controlling magnetic flux not to pass through the permanent magnets and the axial iron cores and generating larger axial levitation force is provided.