Abstract: Time-triggered Ethernet (TTE) is a solution to guarantee the real-time performance of Ethernet. First of all, this paper analyzes the reasons for the introduction of synchronization domain and synchronization priority in large-scale deterministic networks. Then, for the three common clusters in the TTE network, the specific communication rules of PCF that includes synchronization domain and synchronization priority are designed. Finally, the proposed topology and communication rules are validated through simulation software. The experimental data analysis verifies the effect of synchronization domain and synchronization priority on the deterministic network. The experimental results show that the synchronization domain and synchronization priority can improve the accuracy and security of the clock synchronization service in the TTE. It is concluded that the synchronization domain and synchronization priority can increase the flexibility of the network under the premise of meeting the real-time requirements of the TTE network.