Aiming at the limitation that the traditional Z-source inverter has large starting impulse current insufficient boosting ability, and large capacitance voltage stress, a quasi-Z source neutral point clamped (NPC) three-level inverse topology is proposed. Firstly, the working principle of the proposed structure and the design of the quasi-Z source parameters are analyzed, the inverter can achieve higher voltage output at low shoot-through duty ratio, which optimizes the power quality and reduces quasi-Z source network capacitor voltage. Secondly, simplified PQ control strategy is introduced to achieve unit power factor grid connection, and current harmonic distortion rate is reduced. Finally, through the simulink software and experimental hardware research, the superiority of the new quasi-Z source three-level inverter and the effectiveness of the grid-connected control strategy are verified.