ABSTRACT This article investigates the event‐triggered impulsive control of nonlinear systems with external disturbance by using a dynamic gain method. In the existing works, the dynamic gain method is often utilized to handle unknown parameters of nonlinear systems without external disturbances. In this article, the disturbance rejection problem is solved by introducing a sliding‐variable‐based method to the designs of the event‐triggered impulsive controller and adaptive dynamic gain laws. Under the proposed control method: (i) the systems states converge to a region around the origin; (ii) the system states are globally asymptotically convergent. It is proved that the Zeno phenomenon can be avoided. Finally, the proposed control schemes are applied to the electromechanical system, which shows the effectiveness and advantages of the results.