The utility model discloses an intelligent video monitoring device for a strain tower shaped like a Chinese character 'Gan' of an over 110 kV-transmission line in the technical field of high-voltage transmission line monitoring. The technical scheme is that the monitoring device comprises a Wi-Fi communication module, a temperature monitoring module, an intelligent video processing module, a wireless sensor gateway module, an ONU photoelectric communication module, an optical fiber high-voltage intermediate joint insulator, an optical fiber composite overhead ground wire (OPGW) connector box, an induction power supply module, a standby storage battery module, a first all-dielectric self-supporting (ADSS) cable, a second ADSS cable and the OPGW. By the intelligent video monitoring device, the requirements of remote intelligent monitoring of the high-voltage transmission line are met on the basis of a high-voltage induction power supply technology, a high-voltage insulation technology, an OPGW technology, an Ethernet passive optical network (EPON) technology, a video monitoring technology, an intelligent video analysis technology, a temperature monitoring technology and a wireless communication technology.