Abstract: In order to suppress the matching and unmatching uncertainties, a super-twisting sliding mode control of DC microgrid based on event triggered integral disturbance observer is proposed. The finite time convergence of matched uncertainty and unmatched uncertainty was realized by integral disturbance observer, so as to improve the transient and steady-state performance of microgrid. For the proposed controller, the threshold criterion of triggering super-twisting sliding mode control was derived by using Lyapunov theory, and the execution time between successive triggering moments was derived, in which the super-twisting reaching law significantly eliminated the chattering in the controller. The effectiveness of the proposed method is verified by Simulink simulation and controller hardware loop platform.