The invention discloses a switch magnetic resistance motor rotor structure. Two sides of a rotor tooth are provided with axial direction through connection holes which are embedded with a connection conductor. Two ends of the connection conductor connect with copper rings at two ends of a motor. Through communication of the copper rings and copper bars, a damping winding is formed. Inductance change degree of main magnetic flux is weakened. Torque pulsation, harmonic wave loss, and electromagnetic noise are reduced. Compared with a present switch magnetic resistance motor rotor structure, operating efficiency of the structure in the invention is obviously raised, switch magnetic resistance motor torque pulsation and the electromagnetic noise can be effectively reduced, and operating efficiency of the motor is effectively raised. The switch magnetic resistance motor rotor structure can be applied to industries of electric car, weaving and the like.