Abstract: ABSTRACT: The application of electric power information technology can improve the operation efficiency and reliability of overhead transmission lines, realize the remote monitoring and management of line equipment, grasp the line status and fault early warning in time, so as to reduce power outage time and loss. The design and implementation of intelligent monitoring system enables operators to quickly locate and diagnose line faults through real-time monitoring data, so as to improve the efficiency and accuracy of fault processing. The research and practice of power informatization and intelligent monitoring system of overhead transmission lines provide strong support for improving the technical level and service quality of the power industry and building a smart grid. Through research and practice, this paper has positive significance to improve the security and stability of overhead transmission lines and promote the application of power information technology in power industry.