Abstract:  Single base station CORS-RTK has its own unique advantages over multistation CORS-RTK and network RTK. Based on an example of surface movement deformation in Huainan mine, this paper analyzes the measurement precision of single base station CORS system, coordinates data and error. The results show that the measurement data of single base station CORSRTK meets the requirements of precision, which is of great significance to reduce the work load of mine settlement observation.