Abstract: Taking the high and steep slope of an open-pit mine as the research object，based on the engineering geological conditions，the restoration and treatment scheme of the high and steep slope with "cutting slope and reducing load" is proposed，and the slope cutting design of the high and steep slopes in Area A and Area B is carried out respectively. Based on the limit equilibrium method，the slope safety after slope cutting is calculated respectively. The results show that under the action of self-weight and earth⁃ quake，the safety factors of slope after slope cutting in Area A and Area B are 1.753 and 2.301 respective⁃ ly，which are greater than the minimum safety factor of slope.

Key words: high and steep slope, slope restoration and treatment, cutting slope and reducing load