Because of the poor geological conditions and thick soft soil layer,the overall stability of the revetment slope in a port area is not satisfactory.Anti-slide pile is adopted for reinforcement treatment.Based on the software of MIDAS GTS NX,we establish a 3D finite element model,determine the length of the anti-slide pile according to the equivalent plastic strain cloud diagram of the slope without anti-slide pile,and select the optimal arrangement of anti-slide pile according to the results of internal force of pile,overall stability coefficient and project cost under different pile types,pile diameters,pile distances and pile positions.The results show that,when the pile distance is within the range of 3.5D,the pile bending moment increases with the increase of the pile distances.When the pile distance reaches 3.5D,the pile bending moment does not increase significantly.Within the pile distance range of 3.5D,the overall stability coefficient does not change significant with the increase of pile distance while gradually decreases after 3.5D.The anti-slide pile can effectively change the plastic zone distribution of the revetment,and the overall stability improves by nearly 30%.