In order to ensure the safety of the port and adapt to the growth of the coastal port throughput as well as large-scale development of the ship,the upgrading and strengthening of the high piled wharf has become an inevitable trend.As a kind of new scheme,the dowel bar technology has been applied to upgrading and reconstruction for high-piled wharf.Combining with engineering examples,the dowel bar of upgrading technical features for high-piled wharf reinforcement,design calculation method and the corresponding construction technology is described;using professional software for the wharf modeling,the dowel bar reinforcement effect of high pile wharf is verified.The results show that the beams and internal force of pile have a certain degree of improvement.