Preferred structural plane combinations are determined by using stereographic projection principle in the engineering geology to statistically analyze the strike-dip of structural surfaces. And to the uncertain position surfaces

they are searched by a certain distance. Then

the kinematic analysis of every combination block is done by kinematic analysis method; and the blocks that can slide out from slope body are finally gained. Combined with three-dimensional rigid limit equilibrium method

the stability factor of each block in different cases is calculated; and the most dangerous slip body is found. Furthermore

the stability evaluation is done. This method is verified by case study. The results show that this method of analyzing complex rock slope combined engineering geology with kinematic analysis and rigid limit equilibrium method can improve the accuracy of slope stability assessment. The results provide a good guidance for slope design and stability analysis