The embodiment of the invention provides a motor winding wire embedding method, which comprises the following steps that after a binding wire of a winding is unfastened, a thumb and an index finger of a left hand pinch a part, close to a left corner, of a straight line side, a left effective side is rotated by 90 degrees by a right hand, the thumb and the index finger of the left hand pinch a part, close to a right corner, of the straight line side, and the right effective side is rotated by 90 degrees by the right hand; the left side effective edge and the right side effective edge rotate in the same direction, the right hand fixes the winding, the thumb and the index finger of the left hand pinch the lower layer edge close to the corner to be flat, then the upper layer edge close to the corner is pinched to be flat, the left hand does not move, the right hand cards the two side effective edges into a flat shape, the carded winding serves as a winding to be embedded, and the two side effective edges of the winding are rotated by 90 degrees in the same direction, the effective edges on the two sides of the winding are combed to be flat, so that coils on the effective edges of the winding are parallel, intersection between turns and strands of the winding is avoided, the difficulty of driving slot wedges into the hanging grooves is reduced, the effective edges of the winding are embedded into the hanging grooves without using a marking-off plate, and damage to an insulating layer of the winding is avoided.