For the design of breasting dolphins for an offshore oil terminal with a double-side berthing layout,calculation models are established by using finite element analysis software for the structural analysis of three different design schemes of breasting dolphins.The axial forces and bending moments on top of piles,and the displacement of dolphins are obtained and compared.The results show that the ship berthing loads are critical for the design of breasting dolphin,as the berthing loads of the two berths are normally not occurred at the same time and act in opposite directions,a combined breasting dolphin for the two berths can partially share or even offset the ship berthing loads from one side berth,which therefore can significantly improve the structural stress,reduce the pile internal forces and dolphin displacement,and ultimately save costs.