Abstract:Transmission lines cover a wide range,and have long transmission distances,bad environmental conditions and complex geological terrain,so there are many problems such as low efficiency of inspection,long cycle of re-inspection,inaccurate monitoring data and so on. In view of a 220 kV transmission line,there are tower foundation settlement caused by geological disturbance,the deformation of main materials and the increase of inclination of the tower. The Beidou navigation system and the foundation reinforcement system are used to accurately and reliably obtain high-precision monitoring data of millimetre level and comprehensively grasp the real-time status information of various risks. Through constructing the disaster prevention monitoring system for tower deformation and geological hazards of tower foundation in transmission lines,the field application and data analysis provide a technical reference for the application of line disaster prevention.