Under the condition that the pile foundation has been completed,we apply the MIDAS finite element analysis method to analyze the static characteristics of dolphin pier of different heights,and further research on the main factors which influence the stability of structure displacement.It is concluded that the MIDAS finite element analysis of dolphin pier wharf structure performance is feasible,and build-in pile point to dolphin pier has a greater influence on the overall stability,while increasing its weight or changing its stiffness has a smaller effect on the stability of dolphin piers.Moreover,methods like rock rip-rap can be used in engineering to rise the engineering pile foundation point,which can increase the overall structural stability.