The invention discloses a motor rotor winding method, which comprises a rotor rotating shaft, an insulating sleeve and a coil, wherein the insulating sleeve and the coil sleeve the rotor rotating shaft; the insulating sleeve is sequentially sleeved with a
commutator and a winding skeleton; a magnetic pole group is arranged on the outer side surface of the winding skeleton; eight line through grooves are sequentially arranged on the winding skeleton along the circumference; the line through grooves are sequentially numbered N1, N2, N3, N4, N5, N6, N7 and N8 along the circumference; the
commutator is sequentially provided with eight
brass hooks along the circumference; the
brass hooks are sequentially numbered P1, P2, P3, P4, P5, P6, P7 and P8 along the circumference; an included angles between the
central line of an armature stack and the
central line of the corresponding
commutator is 4.5-8.5 degrees; the
central line of the commutator is close to a left pole end of a rotor. By double groove-crossing, double groove-crossing is required for each winding of each hook, so that the resistance of a motor rotor winding is evenly distributed; the stalling torque deviation of the motor is relatively small; the
energy loss of the motor is reduced; and the service lifetime of the motor is prolonged.