In order to study the evolution law of structural damage of all-vertical-piled wharf with steel pipe piles,we quantify the damage degree of wharf steel pipe pile by Ou Jinping seismic damage model,establish the calculation model of the wharf bent structure by ABAQUS finite element software to analyze the dynamic time-history response of the structure during seismic,and study the damage evolution law of the wharf piles with the seismic time-history and seismic intensity.The results show that the damage accumulation of pile mainly occurs in the period when seismic response changes dramatically and plastic damage occurs mainly at the top of each pile.Pile foundation enters plasticity repeatedly under strong seismic excitation,which leads to the gradual destruction of the structure.Damage value of pile is composed of displacement term and energy term.The former takes control action at the early stage while the latter contributes more at the later stage,and the proportion of displacement damage is higher than that of energy dissipation damage.Damage value of each pile presents an upward trend with the increase of seismic intensity.The damage distribution of pile foundation gradually increases from the sea side to the land side,and the land-side pile undertakes larger horizontal seismic force,which is also the main component of dissipating seismic energy.