PHC pipe piles have strong adaptability to engineering geology，and are widely used in port engineering. When it takes hard clay layer，dense sand layer or bedrock as the bearing layer，and the above soil layers fluctuate violently and irregularly，the pile sinking quality is very difficult to control，which is easy to cause the problem of sinking abnormal piles such as high or low. For sinking low pile，in order to ensure the project progress and save investment cost，pile connection measures are generally given priority. Aiming at the connection scheme of sinking low pile，this paper focuses on a new type of pile connection structure of PHC pipe pile，that is，according to the actual elevation deviation of pile top，the pile core channel steel is used to strengthen or combine the pile top with cylindrical concrete，so as to meet the requirements of rigid connection between pile foundation and superstructure. The practice results show that the new pile connection structure is suitable for sinking low piles with different slopes，which can effectively avoid the disadvantages of additional structural weight，increased construction difficulty and poor overall appearance quality caused by conventional pile connection by adjusting the scale of superstructure，and can provide reference for similar projects.