In response to the problem of damage and cracks in the pile foundation concrete of wharf that is in service for many years，relying on the hydraulic overhaul project of a certain wharf in Ningbo，we carry out the design and development of steel sleeve，grouting operation system，and ultra early strength grouting material.Combining with the construction process，we form a complete set of reinforcement and repair technology，and carry out the on-site construction and quality test.The results show that the compressive strength of the ultra-early strength grouting material can reach over 20 MPa within 12 hours，and its bonding strength with the steel sleeve can reach over 6 MPa.Other performance parameters comply with the requirements of the specification.The developed complete technology is used to successfully reinforce and repaire 232 pile foundations within 6 months.