Abstract: Aiming at the situation that the upper part of the southern part of a phosphate mine openpit is a dump，the Slide software was used to analyze the stability of five typical sections of the open-pit mine. The results show that the safety factor of the slope meets the requirements of Grade III slope stabili⁃ ty，and the designed final open stope slope is in a stable state. Measures such as surface water manage⁃ ment，regular slope maintenance，and establishment of a slope monitoring system are put forward for the open-pit stope slope to ensure the safety of the open-pit stope slope and lay the foundation for the next min⁃ ing work of the mine.

Key words: open-pit mine, slope stability, Slide software, slope monitoring