Abstract: As a deterministic network technology, time-sensitive network can solve the problems of low reliability and uncertain transmission delay of SV message in digital substation. Firstly, the traffic characteristics of sampled messages are analyzed, and three time-sensitive network scheduling methods for sampled messages are presented. Then, based on the typical substation process layer structure, three scheduling methods are simulated. Finally, by analyzing the delay and bandwidth utilization, it is concluded that the joint scheduling method of Hold/Release mechanism, TAS and frame preemption mechanism is more suitable for SV message transmission in digital substation. The research results are of great value to the optimization of SV message transmission performance in digital substation.