A deep landslide displacement monitoring instrument with the function of torsion direction measurement is developed for the monitoring and warning of landslide geological hazards，by the sensor with torsion direction measurement and deep displacement and data acquisition, the whole process of landslide can be monitored to study the change process and regularity of torsion directions and deep displacement of landslide body before and after the sudden sliding. In this paper, auto-monitoring and wireless Internet technologies are also studied to realize real-time monitoring of landslide torsion direction and deep displacement for whole process, which will promote the technical progress for landslide geological hazard monitoring.