The utility model provides a power transmission line intelligent monitoring device based on video differentiated technology. The power transmission line intelligent monitoring device based on the video differentiated technology includes a system monitoring auxiliary unit, a high-voltage power transmission line iron tower, a wireless communication network, an intelligent video recognition controller, a data base, a central processing computer and a monitoring center. The system monitoring auxiliary unit is installed on the high-voltage power transmission line iron tower, and is connected to the wireless communication network in a connection manner of wireless communication and connected to the central processing computer through the wireless communication network at the same time. The central processing computer connects with the monitoring center and the data base at the same time. The data base also connects with the intelligent video recognition controller. The system monitoring auxiliary unit functioning as an onsite monitoring terminal adopts a modularized design and includes an industrial camera, a video/audio, a central control panel, a video/image compressing module, a loudspeaker, a wireless communication module and a power source module composed of a solar cell and a storage battery. The power transmission line intelligent monitoring device based on the video differentiated technology provided by the utility model is simple in integral structure, convenient in installation, operation and usage, good in stability, and high in reliability.