Abstract: Aiming at the problems of delay error and midpoint potential balance in the finite control set model predictive control (FCS-MPC) of the traditional single-phase midpoint-clamped H-bridge cascade inverter, an improved FCS-MPC control method for single-phase midpoint-clamped H-bridge cascade inverter is proposed. An experimental platform is set up to compare and analyze the proposed control method with the traditional FCS-MPC control method, and it can be seen through the experiments that the improved FCS-MPC effectively improves the effect of the mid-point potential balancing, reduces the range of mid-point potential fluctuation, and reduces the system stabilization time by 5-7 ms, thus proving the correctness and superiority of the proposed method.