Abstract: We propose a finite-time event-triggered hybrid control (FETIHC) strategy based on event-triggered impulsive observers (ETIO) for voltage control in DC microgrids (DCMGs) subject to unknown external disturbances. The approach aims to enhance dynamic response speed while reducing reliance on physical sensors. First, a mathematical model of this DC microgrid is established, and a novel pulse observer suitable for this system is designed to estimate the inductor current and output voltage states in real time. Second, combining finite-time convergence theory, a pulse-type finite-time controller is constructed to generate control signals based on the observer output. The stability of the proposed control is proved using a Lyapunov function, and Zeno behavior is also excluded in the stability analysis. Simulation results demonstrate that compared to traditional continuous control and time-based pulse control schemes, the proposed method significantly enhances system control efficiency and resource utilization. This provides an efficient and reliable solution for the safe, stable, and economical operation of isolated microgrids.