This thesis conducted the evaluation of slope grid models according to safety factor and computational time by ANSYS. During the division of slop grid, potential sliding surface was further subdivided on the basis of global model to achieve optimization of grid division. After analyzing the relative errors of safety factor and the correspondent computational time, it was shown that dividing the grid too rough would result in unreliable calculation, while making it much precise would need a long

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... calculating time. To balance, it was suggested that the potential sliding surface of the model should be fixed in advance, and thus to divide the whole model by one tenth of the slope height, and lastly to partially refine the potential sliding surface with one third side length of the non-refined grid.