High-power-density mixed magnetic water lower thruster

The invention discloses a high-power-density mixed magnetic water downward propeller. The underwater propeller comprises a shell assembly and a stator assembly, and the stator assembly comprises a stator iron core, a plurality of axial windings and a plurality of radial windings which are of an integrated structure. The rotor assembly comprises a rotor yoke, an axial permanent magnet group and a radial permanent magnet group, the axial permanent magnet group is arranged opposite to the axial winding, the radial permanent magnet group is arranged opposite to the radial winding, and a plurality of blades are distributed on the surface of an inner ring of the rotor yoke at intervals; and the bearing assembly is connected with the rotor assembly and the shell assembly. The rotor assembly and the stator assembly move under combined driving of the axial magnetic field and the radial magnetic field, direct rotation of the blades is achieved through rotation of the rotor assembly, and the function of the mixed-magnet