The pile-supported wharf structure in soft soil ground in deep-water is subjected to multiple loads such as environment loads and complex work loads.The research shows that ship impact load is the horizontal control load,yet long-term cyclic wave loads will cause the softening of the soft clay soil around piles,leading to the deterioration of the bearing capacity of the wharf structure under other loads.In view of this,a 3D elastoplastic finite element calculation model of wharf structure-foundation soil is established using ABAQUS,in which both weakening of soil strength and degradation of soil stiffness are considered with the help of the USDFLD subroutine.Furthermore,the comparative analyses of the bearing characteristics of the wharf without considering soil softening,only considering weakening of soil strength,only considering degradation of soil stiffness,and both considering weakening of soil strength and decaying of soil stiffness degradation are carried out.The results show that the safety factor of the wharf under the impact load considering the softening of soil strength is reduced by 14.72% when compared with only considering the weakening of the soil strength,and that is reduced by 15.28% when compared with only considering the decaying of soil stiffness,yet that is 19.44% when compared with both considering weakening of soil strength and decaying of soil stiffness.Besides,the plastic deformation range of the soil around the pile is significantly increased and the stress of pile body decreases slightly in the ultimate state,and the structural stability is significantly reduced.