Replacing the silicon steel rotor core of original motor by the amorphous alloy rotor core, effects of amorphous alloy rotor core on the performance of motor was analyzed based on finite element software Ansoft. Compared with the original motor, the load torque of the remanufacturing motor was enhanced by 2.6%, the efficiency was 0.05% higher, and the cogging torque was highly improved. In order to reduce the cogging torque, stator with skewed slots was adopted. When the skewed slot number was 1, the cogging torque of the motor was 0.128 N·m, which was reduced by 92.36% compared with the remanufacturing motor and was 38.46% lower than the original motor.