At present, traditional synchronization technology can’t meetStheSaccuracy requirement ofSsubstationSsynchronization. Based on the research onStime synchronizationStechnologySof pulseSsynchronization, codingStimeSandSnetwork, their time precision and network mode were compared. According to the different requirements on the reliability and accuracy of station level , bay level and process level, considering the cost of construction, maintenance and other factors, proposes the SNTP IEEE 1588 network synchronization scheme, and points out the development trend of substation of time synchronization technology.