The problem of fixed-time group consensus for nonlinear multi-agent systems based on event-triggered mechanism is studied. A nonlinear distributed event-triggered group consensus control protocol is proposed, and the condition of the updating controller triggered by states information is given. The control protocol is not restricted by the in-degree balance condition and only needs its own state information to communicate with the neighbor agents to achieve the group consensus quickly in fixed-time. The convergence time is independent of the initial state of the agent, which can effectively reduce the system controller update frequency and system resource consumption. Combining the algebraic graph theory, the matrix analysis and the Lyapunov stability theory, it is proved that under the proposed strategy, the multi-agent system can achieve group consensus in a fixed time, and Zeno behavior does not exist in the system. Finally, simulation example verifies the feasibility of the theoretical results.