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Aceh Besar is one of the areas prone to flash floods and landslides. On January 2, 2013 there was a flood and landslide at Tebing Krueng Teungku in Seulimum District. The collapse of a slope can be caused by an increase in the shear stress of the soil mass or a decrease in the shear strength of the soil mass to withstand the forces that are mobilized due to the soil mass and the presence of external loads. Based on these problems, we need an analysis that can provide solutions to slope problems by repairing or strengthening. Calculations were performed using the Geo Slope/W Program and Simplified Bishop Method on the Krueng Teungku cliff at Points A-01, B-02, and C-03. In the calculation phase of the Geo Slope/W Program, the Safety Factor (SF) values are 1,087, 1,041 and 1,158. In the calculation using the Simplified Bishop Method the SF are obtained namely 1.033, 1.017, and 1.106 where these values do not meet the safety factor requirements of SF>1.25. Therefore it is necessary to make efforts to strengthen the slope to avoid landslides such as installing gabions or retaining walls in accordance with the conditions on the ground.