Self-moving device and hub motor used for self-moving device

The invention discloses a self-moving device and a hub motor used for the self-moving device, and the self-moving device comprises a cutting assembly which is used for cutting vegetation; a main body for supporting the cutting assembly; the walking system is used for driving the main body to move; the walking system at least comprises walking wheels; the hub motor is integrally arranged in the walking wheel; the radial length of the hub motor is larger than or equal to 18 cm and smaller than or equal to 33 cm. The axial thickness of the hub motor is smaller than or equal to 3.5 cm. The motor and the walking wheel are matched through flattening design, on the premise that the overall dimensions of the walking wheel and the whole machine are not changed, the integrated design of the motor and the walking wheel is achieved, a walking motor and a gear driving assembly do not need to be arranged inside, the structural universality is high, installation is convenient, and reduction of the overall dimension and the