Abstract: To address the problem of poor control effect and DC bus voltage oscillation phenomenon caused by the influence of external disturbances on the DC-AC converter of AC microgrids, a dynamic cascaded self-disturbance rejection voltage stabilization control strategy is designed. First, a new observer is introduced based on the initial state observer to form a cascaded observer linear self-disturbance rejection control structure, and a dynamic adjustment factor is designed to optimize and adjust the observer gain parameters online. Secondly, based on the disturbance observer, an optimized setting range for dynamic factors is provided, and theoretical analysis of the system’s anti-interference and stability is conducted based on the frequency characteristic curves of tracking performance and anti-interference performance. The influence of observation and control parameters on the overall performance of the system is explained,and the optimal parameter setting range is obtained. Finally, a digital simulation experimental model of the AC microgrid is built on the Matlab/Simulink simulation platform, and multiple simulation conditions are designed to compare and verify other control strategies with the proposed control strategy. The correctness and superiority of the designed control strategy are proved, and it is demonstrated that the proposed control strategy has good voltage oscillation suppression ability and improves voltage stability.