This work investigated the resilient consensus of second-order multi-agent systems under DoS attacks, where the agents involve with nonlinear dynamics, and the underlying topology admits a directed spanning tree. By tailoring some simple triggering condition, an event-triggered control protocol is designed to achieve consensus to reduce the control update, and some efficient criterion is given with the aid of Lyapunov stability theory and comparison principle, which reveals the role of the ratio between the control time and rest time of the controller. A numerical example is also given to demonstrate the validity of the theoretical result and the applicability of the control scheme.