The invention discloses a communication network security processing method and device. To-be-processed target data communication networks comprise access networks and extranets of a plurality of preset regions. The method comprises the steps of deploying firewall equipment on boundaries of the access networks of the preset regions of the target data communication networks, wherein firewalls are used for carrying out preset protection polices; and adding abnormal traffic management and anti-distributed denial of service equipment on the boundaries of the information extranets, wherein the abnormal traffic management and anti-distributed denial of service equipment is used for identifying attack traffic for attacking networks from network traffic. According to the method and the device, thetechnical problem that in the prior art, the data communication networks of electric power companies have no abnormal traffic management and anti-distributed denial of service system is solved.