Abstract: Slope stability guarantees open-pit mining safety. The paper analyzes cause of western slope sliding in Bogela open-pit mine according its status, and puts forward treatment technology correspondingly. The local sliding of the low plastic silty clay rock mud in the western slope rock mass is the main cause of large-area sliding. With the implement at ion of the "slope plastic + slope sealing + ravine leveling and current conduction + anti-filter slope pavement + slope bottom stabilization + internal slope drainage", and following the treatment principle of from upper to lower, the study carries out comprehensive treatment according to zones and stages. The treatment results show that among the 5 typical treatment sections, the minimum safety coefficient all reaches the requirement of safe production, within half a year, slopes have no obvious displacement and subsidence. The treatment technology effectively ensures the operation safety in Bogela Gold Mine.