In view of the characteristics of information flow in smart substation, a development scheme of special smart communication device based on IEC61850 is proposed. This paper analyzes the economic costs and technical application of industrial Ethernet switch in smart substation, and explores the special application requirement for communication device of smart substation in future. Special communication device abandons the mechanism of data process for industrial Ethernet technology, adopts several technology such as virtual private wire, hierarchical OAM, end-to-end QoS, precise clock synchronization and standard modeling, optimizes network resource configuration management, and improves the information transmission efficiency of communication device and network performance.