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The boundary equilibrium method is one of the methods used in numerical analysis in the geotechnical field. Slope stability is determined by the values of safety factors. This is obtained from various methods, discussing the usual method or Fellenius method, Bishop method, Bishop Simple method, Simple Janbu Method, Spencer Method, and General Limit Equilibrium method, GLE/Morgenstern-Price method. Pore water pressure, soil shear strength, and slope geometry are factors that can affect slope stability. The slope stability analysis was carried out on the slope by multi-level gravity walls. The research location was the natural slope in Tupa Village, Bulango Utara, Bone Bolango Regency. The natural slope had collapsed. After reinforcing the slope with a multi-level gravity walls, the slope was stable. The safety against sliding, FSs = 1.65, the safety against the overturning, FSo = 3.06, the safety against of the bearing capacity failure, FS = 6.48, and the safety factor for global slope (using GLE/Morgenstern-Price method), FS = 1.64. The results of the study show how to increase slope stability increases with increasing shear strength. However, more pore pressure can cause a significant decrease in safety factors. In addition, increasing the load on the slope can also reduce the value of the safety factor.