Based on the analysis of the causes of the landslide problem in the upper reaches of the left bank slope of Naji navigation junction project,it is concluded that we shall pay attention to the stability of slope soil,the sudden drop of the groundwater level,as well as the erosion and adsorption of the bank slope.Two treatment schemes,i.e.slowing down the bank slope scheme and cement mixing pile reinforcement scheme,are put forward for the bank slope landslide.Comparing them in safety,construction,project investment and project effect,we recommend the slowing down bank slope schemed.