The utility model discloses a transmission tower's long -range safety monitoring system, it relates to the electric power tech field. It includes power module, data acquisition module, communication module and long -range analysis module, and power module, data acquisition module, communication module all install on transmission tower, and power module is connected with data acquisition module, communication module respectively, and data acquisition module meets communication module, and communication module passes through data acquisition module 4 and is connected with long -range analysis module, data acquisition module comprises displacement sensor, air velocity transducer and main control computer for gathering and saving the fast data of displacement soft breeze, displacement sensor, air velocity transducer all are connected with the main control computer, and the main control computer connects to communication module. The utility model discloses a displacement collection converts and monitors transmission tower's security for the stress value, and monitoring results stability directly perceived is easily judged, the reliability is high.