For a class of discrete-time linear multi-agent systems subject to time-varying delays and aperiodic denial-of-service (DoS) attacks, a dynamic event-triggered-based predictive control scheme is proposed. The proposed scheme can effectively reduce the adverse impacts of time-varying delays and aperiodic DoS attacks on system performance by introducing the networked predictive control approach. Moreover, the dynamic event-triggered control mechanism is designed on the sensor side of each agent to reduce the data transmission frequency in the feedback channel of each agent, thereby saving the network resource consumption of the system. Subsequently, the sufficient and necessary conditions to guarantee asymptotic stability and to achieve output consensus of closed-loop multi-agent system are given. Finally, the effectiveness and correctness of the proposed scheme are verified by the numerical simulation results.