The performance degradation is an important factor affecting the service life of high-pile wharf.Other factors,such as ship impact and bank deformat,may cause damage to structures or members during the operation process.To repair and maintain the damaged wharf,there is no scientific and reasonable choosing method in many kinds of maintenance technologies for the high-pile wharf.According to the characteristics of the maintenance technology for the high-pile wharf,we propose special index and evaluation index and establish the evaluation system to compare evaluation indices of deferent maintenance technologies at the same level,and to provide a guidance for the maintenance technology selection and maintenance design method of high-pile wharf structures.