The invention discloses a wireless telecontrol communication channel of a power transmission line. The wireless telecontrol communication channel comprises wireless communication devices, a firewall, a communication management machine, a video server and an Ethernet switch; the wireless communication devices are disposed on rod towers, and the firewall, the communication management machine, the video server and the Ethernet switch are disposed in a transformer station; the wireless communication devices are connected with state monitoring devices, video monitoring devices and the firewall, and the wireless communication devices send data, acquired by the state monitoring devices and the video monitoring devices, of the power transmission line to the firewall; and the video server and the communication management machine are connected with the firewall, the video server is connected with the Ethernet switch, and acquired data is transmitted to a user. The system combines the electric power communication protocol conversion technology with a network information security technology, can effectively guarantee network information security and can provide a wide bandwidth and high communication quality; and installation is convenient and fast, expansibility is good, waste of manpower and waste of material resources are reduced, and construction cost is saved.