Proceeding of the Joint International Symposium on Deformatuon Monitoring. 2-4 November, 2011. Hong Kong. China. Report. A real-time, accurate measurement of slope of open pit could provide reliable information for slope management and the warning system, directly related to the economic benefits and production continuity in the open pit. This paper proposed an innovative technique, based on synthetic aperture radar interferometry and implemented using ground-based instrumentation, has been applied for monitoring slope of open pit. Compared to conventional measurements, The proposed technique presents high spatial resolution and accuracy, generates a topography-free interferogram, provides multi-temporal displacement and velocity map, supplies a deformation field of slope, which represents reliable information for the interpretation of slope kinematics and short-term evolution. The experiment shows that the new technique is reliable for monitoring slope of open pit.