Hub electric driving device for motor vehicle

The utility model provides a wheel hub electric driving device for a motor vehicle, which comprises a wheel hub, S-pole magnetic steel and N-pole magnetic steel, the S-pole magnetic steel and the N-pole magnetic steel are fixedly adhered to the inner wall of the wheel hub, the rear end of the wheel hub is connected with a motor rotor inner shell, the left end of the motor rotor inner shell is movably provided with a motor rotor middle section, and the right end of the motor rotor middle section is movably provided with a motor rotor. A motor rotor outer shell is movably installed at the left end of the middle section of the motor rotor, a fixed gear is fixedly connected to the right end of the motor rotor inner shell, a brake disc is movably installed at the right end of the fixed gear and arranged on the outer surface of a fixed shaft in a sleeving mode, a connecting shaft is movably installed at the right end of the fixed shaft, and a plurality of heat dissipation openings are formed in the edge of the moto