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In order to improve the overall electromagnetic performance of spherical induction motors, a multi-objective optimization design method combining the response surface method and particle swarm optimization was proposed, aiming at the two key optimization objectives of motor starting torque and torque ripple. Firstly, this paper introduces the basic structure and operation principle of spherical induction motor. Then, the effective design parameters and their ranges are selected to establish the optimal response surface model, and the optimal parameters are obtained by particle swarm optimization (PSO) algorithm. Finally, the finite element analysis of the motor scheme before and after optimization is carried out to verify the effectiveness of the multi-objective optimization method.