Abstract:The Danba landslide is located on the rear of Danba town in Sichuan Province. The total volume is about 2.2×106 m3. The speed of deformation became obvious in October 2004,and accelerated in February 2005 with the maximum value reaching 5 cm per day and the landslide tending to slide entirely. If the whole landslide moved down,more than half of the Danba town would be destroyed. The related agencies organized the emergency aid and comprehensive remedial projects as soon as possible. The attention was paid to how to make good use of the monitoring data to analyze the genetic mechanism and the stability of the landslide,and to guide the design and construction of the prestressed anchoring work. The study shows that,by making use of the observed data of the surface displacement,the displacement in depth and the tension of anchor cables,not only the anchoring effect of cables can be evaluated,but also the design and construction options can be adjusted in time,which indicates that the monitoring plays a very important role in landslide treatment.