Abstract: In the switched reluctance generator (SRG) based starting/generating system, system efficiency and voltage quality are critical optimization objectives that are both related to the turn-ON angle. However, the internal relations between them are complex, and the existing literature lacks systematic analysis, making it difficult to optimize the performance of the SRG cooperatively. This paper analyzes the influence of turn-ON angle on SRG efficiency and power factor in single pulse mode through simulation and experiment to meet the requirement of constant voltage and constant power output. The analytical expression of voltage ripple is derived based on the linear model of SRG phase current, and the influence of turn-ON angle on voltage quality is analyzed. A multi-objective optimization function is proposed to obtain the optimal turn-ON angle, which considers system efficiency and voltage quality, and improves the comprehensive performance of power generation. Finally, experiments are conducted to verify the correctness of the simulation conclusion analysis and the effectiveness of the proposed multi-objective optimization method.