Abstract: Aiming at the problem of synchronization information waste and reliability in time-sensitive network(TSN) clock synchronization process, the research on improving network clock synchronization performance was carried out. Based on the original clock synchronization spanning tree, a new port enhancement method is proposed, which includes a new synchronization port role and a clock correction algorithm. This method not only provides reference correction for synchronization of the slave clock node, but also establishes an additional redundant path for synchronization of the slave clock node by using the original discarded synchronization information. The simulation results based on OMNeT ++ show that the method not only improves the utilization rate of synchronization information in the network, but also improves the accuracy and robustness of node clock synchronization without aggravating network traffic overhead.