When the prefabricated beam of high-piled wharf is directly connected with pile foundation, the pile top structure design is the key and difficult point of the technical scheme.It is to ensure that the beam, pile core and pile foundation are connected reliably, meanwhile the pile core structure has enough bearing capacity.Based on an actual project, we put forward a new pile top structure which is suitable for the fully prefabricated beam, and carry out calculation and analysis on it.The results show that the combined capacity of new and old concrete can be improved by using corrugated steel pipe without removal for the mold of reserved cavity of the fully prefabricated beam.It is feasible to use profile steel group instead of steel bar cage in pile core structure.Considering that the bonding force between profile steel and concrete is different from that between steel bar and concrete, the anchoring calculation of the pile core using profile steel in the reserved cavity of the prefabricated beam should be carried out.