The invention discloses a disc type motor rotor with a pole shoe composite magnetic pole structure, and relates to the field of motors. The disc type motor rotor comprises a rotor supporting disc, a hole is formed in the center of the rotor supporting disc, and a groove is formed in the surface of one side of the rotor supporting disc and used for installing a rotor core and composite magnetic poles; the rotor iron core is of an annular structure, is arranged at the bottom of the groove and is tightly attached to the rotor supporting disc, T-shaped baffles distributed in the radial direction are arranged on a surface of a side, away from the rotor supporting disc, of the rotor iron core, and the T-shaped baffles divide the rotor iron core into a plurality of fan-shaped spaces at equal intervals along the circumference; the composite magnetic poles are arranged in the fan-shaped spaces on the rotor iron core; the composite magnetic poles comprise permanent magnets and pole shoes, and the pole shoes made of composite soft magnetic materials are installed on the surface of the permanent magnet. The radians of the pole shoes on the surface of the permanent magnet can be adjusted, sinewave air gap flux density is generated, the output torque of a motor is smooth, the pole shoes can protect the permanent magnets against field loss under the action of a demagnetization field, the field weakening capacity of the motor is improved, and the motor is easy to machine and suitable for batch production.