The paper gives the applications of double-row piles supporting structure in Xiabu port revetment engineering of Dongshanbu fishing port in Ruian.The double-row piles supporting structure can avoid the influence of foundation pit excavation on the surrounding buildings effectively.The main design parameters,such as pile length,distance,cohesion,internal friction angle and ground load are described.The stability of the structure is checked by using Lizheng deep foundation pit supporting calculation software,and the results indicate that all items satisfy the requirements of regulation.