The invention discloses a hub motor and an electric balancing vehicle of an electric balancing vehicle, the electric balancing vehicle comprises a vehicle body and wheels fixed on both sides of the vehicle body, Wheels including hub motors, The hub motor comprises a rotating shaft, Rotor and pin, The rotating shaft comprises a fixed section, the fixing section is an area where the outer surface ofthe rotating shaft is provided with threads, the outer surface of the fixing section is provided with a first pin groove, the first pin groove is a groove, The rotor includes a central bore, the central hole is a through hole, the inner side wall of the central hole is provided with threads, the inner side wall of the central hole is provided with a second pin groove, the second pin groove is a groove, The rotating shaft and the rotor are threadably matched with the central hole of the rotor through a fixed section of the rotating shaft, the first pin groove and the second pin groove are matched to form a pin groove, the pin and the pin groove are matched and fixed, the hub motor comprises an electric line, the rotating shaft comprises a wire-passing hole section, the wire-passing hole section is connected with the fixed section, the wire-passing hole section is used for passing the electric line, and the wire-passing hole section is an assemblable structure.