The invention discloses a power transmission operation monitoring method which is applied to a power transmission operation mobile terminal. Through acquiring real-time operation point data from a satellite ground reference station, a mapping relation between real-time operation point data and current operation geographical coordinate data is generated. Whether the current operation geographical coordinate data are same with the geographical coordinate data of a preset operation safe area and a preset safe operation path is determined. According to the power transmission operation monitoring method, multi-base-station network RTK technology and a comprehensive accurate positioning manner of continuously operating a Beidou satellite reference station are utilized for realizing centimeter-level precise positioning of personnel and equipment. Through a power transmission high-precision map, combination of geographical position and the map point of personnel and equipment is realized, and accurate positioning and panoramic monitoring can be performed on the personnel and the equipment, and strong technical insurance is supplied for application at aspects of electric power operation, field safety control and electric power construction.