Abstract: In order to meet the real-time performance of operating expressway slope monitoring, the Beidou+comprehensive intelligent monitoring cloud platform suitable for slope deformation monitoring is developed based on GNSS satellite positioning system.The platform has multi-source and multi-dimensional information intelligent display and visual interaction functions, good human-computer interaction interface, strong scalability, and can store, analyze and manage real-time information returned by on-site monitoring equipment.The whole process from front-end data acquisition to monitoring results display is intelligent.The platform is applied to an embankment slope of Jiangluo Expressway.The monitoring results and on-site inspection show that the embankment slope is in a relatively stable state at present, and the automatic monitoring equipment and monitoring cloud platform are used to effectively monitor the slope continuously.This paper provides engineering reference for the application of GNSS positioning technology in slope deformation monitoring of operational expressways.