Synchronization process of wireless mesh network

A precise synchronism method of a wireless mesh network is disclosed, wherein synchronous timing information and presynchronization are added in the synchronous protocol element of the beacon frame of the wireless mesh network, comprising a presynchronization priority obtained through the preestablishing and the routing message and a synchronism post priority, and the preestablished priority of the same mesh network node is different; when not in the synchronism and loosing the synchronism, the synchronous post priority is equal to the presynchronization priority, after the synchronism, the synchronism post priority of the node is equal to the synchronous post priority of all the synchronism nodes. When in the synchronism, the node with the low presynchronization priority is synchronized to the node with the synchronism post priority. When a plurality of nodes provide the same priority, the slower node is synchronized to the faster node. According to the invention, for the deterministic access of the mesh network, particularly for the application scene of the broadcast and the information assembling to the same node, thereby advancing the throughput of the network.