The curvature modal,curvature modal difference and wavelet transform are employed to correctly identify the damage of the high-piled wharf structure.The feasibility and applicability of these methods are verified through simulation experiments of a high-piled bent under different operating conditions.The comparison results show that the wavelet transform of curvature modal can localize the structural damage when the non-destructive modal is unknown.Besides,the curvature modal difference can exactly localize the structural damage when the non-destructive modal is known.The further analysis shows that the peaks of wavelet transform coefficients and the sudden changing values of the curvature modal difference can be utilized to determine the damage extent for multi-damage of high-piled wharf structure.