The invention relates to the harmonic priming asynchronous motor and the end part structure of its rotor winding. To make this end part structure of the rotor winding, the applied resistance should be transferred to the winding in the motor, so no slip-rings and electric brush. And the applied resistance should string the rotor winding when starting, and withdrwn rotor winding when operating. The end part structure of the rotor wind is made up of as follows: the end ring of several rotor windings differ in diameter connects with two resistance rings differ in diameter and connects with the end ring and centre ring before the quadratic power source outlet link edge of the up and down layer electric coil turn for 90 degrees along its cross section. And the resistance ring connects with the end ring centre ring and the series ring passing the overlap joint. It consists of the three-end ring, four-end ring and the no-stand structure.