There are different types of defects of large pipe piles,such as concrete shed and steel corrosion,which have an unfavorable influence on the bearing capacity of the dock.Based on the complete pile-soil load transfer system theory,the formula of the remaining bearing capacity of the defect pile is derived.The influence of defects like concrete spalling and steel corrosion on the ultimate bearing capacity of a single is studied.The result reveals that the position of concrete spalling has an influence on the vertical compress ultimate capacity and the vertical uplift ultimate capacity.When it is inside the soil layer,the vertical compress ultimate capacity will have a decrease of 0.07%,while the vertical uplift ultimate capacity will have a decrease of 1.72%.The axial-compression capacity is different,the impact of the defect on the concrete pile on axial-compression capacity is a decrease of 25.65% and that for the steel cohesion on axial-compression capacity reaches a decrease of 20.95%.The concrete defect on the capacity is much greater.