The utility model relates to an 110kV digital substation security network, which comprises a network security evaluating system, an active defense system and an electric power network security system, wherein the network security evaluating system is used to learn about current safety status of the network, the active defense system is used for active defense and prevents network data from being invaded, and the electric power network security system is used for communication network security of an 110kV digital substation. The 110kV digital substation security network can achieve exact prediction of network security situation, and is used to improve prediction accuracy of the network security situation.