Abstract: To study the influence of slope inflection point position on slope stability, strip mechanical models of slopes with different inflection point positions were established based on the simplified Bishop method. The 117 slope models with different curvature and inflection point positions were simulated and analyzed by FLAC3D. The results show that the change of the slope inflection point position will affect the gravity of the strips in the slope sliding mass, and then affect the stability of the slope. Different trends in the safety factor of the slope with different shapes with the movement of the inflection point. The safety factor decreases linearly with the downward movement of the inflection point for interior polyline-shaped slopes and increases linearly with the downward movement of the inflection point for exterior polyline-shaped slopes. The safety factor of the slope decreases as the absolute value of slope curvature increases. The inflection point position effect of slope stability can be applied to the steep end-slope mining of open-pit coal mines, which can reduce the stripping ratio and improve the resource recovery rate.