Abstract: GPS slope stability antomatic monitoring system is consisted of high precision GPS sensor subsystem, data transmission subsystem, data processing and control subsystem, and auxiliary support system, it can automatically monitor the sensitive areas of slope (especially the large-scale slope).The system can automatically transfer monitoring data to monitoring platform and display deformation value, rate and acceleration of each monitoring point graphically, moreover, generate the monitoring database. By setting the alarm threshold, the system can realize alarm notification preparedness for the different deformation values of slope, which can provide the basis of controlling slope deformation destroy quickly and accurately.