Abstract: In order to reduce the risk of slope failures in mines by collecting and analyzing existing geological data from the Nanfen open-pit iron mine，integrating the mine's excavation planning maps with on-site geological surveys，the safety monitoring levels for the pit slopes were classified based on parame⁃ ters such as slope height，gradient，geological conditions，and stability assessments. A comprehensive de⁃ sign was developed for the slope monitoring and early warning system. The implementation of supplementa⁃ ry monitoring technologiesincluding ground-based radar，GNSS，blast vibration monitoring，and internal displacement monitoring were carried out. Through data compilation and analysis，the system provides a reliable basis for evaluating the stability and safety of mine slopes，which achieves full coverage monitor⁃ ing of high and steep slopes exceeding 150 m in height，meets national monitoring standards facilitates a transformation from post-accident response to proactive，pre-accident early warning and prevention. Com⁃ pared to the period before the enhanced monitoring system implemented，equipment loss due to slope in⁃ stability is reduced by approximately 3.7 million yuan/a，effectively preventing personnel injuries. The sys⁃ tem also reduces the risks associated with manual monitoring and significantly decreases the frequency of manual inspections on high and steep slopes，saving about 200 000 yuan/a in labor costs. By predicting and assessing slope risks，the production scheduling systemadjusts and optimizesthe mining sequence ra⁃ tionally. As a result，the optimized ore output increased to 14.59 million t，representing a year-on-year increase of 420 000 t in total ore production，generating additional economic benefits of 49.4466 million yuan/a.

Key words: radar, slope monitoring, early warning system