Abstract：The creep deformable mass of Mayan Slope，which is located at the dam site of Xiangjiaba Hydropower Station，is a typical structure-controlled integral sliding landslide. It is important to monitor deformation inside the slope，so inclinometers are disposed according to geological analysis and exploration. Based on inclinometer deformation curve obtained，the relationship between the curve of displacement-depth and geological characteristic is analyzed，and the location and thickness of the slipping zone are determined. Moreover，the mechanism of creep movement has been studied. So the corresponding reinforcement measures have been taken in time. Then，based on the displacement-time curve of slipping zone，the creep deformation trend is illustrated，and the stability condition after reinforcement is also estimated. It is found that interlayer JC① is the creep-controlled slipping zone with typical bedding slipping failure modes. The treatments including load-decreasing，reinforcing and groundwater-draining have greatly reduced the creep rate of speed，and the deformable mass tends to be stable. It shows that the deformations of landslide monitored by inclinometers are practicable，and it is also valuable for analogical slope-monitoring.
