The back porch ship impact force will be added on the high-piled wharf under the simultaneous operation of the apron mooring and back porch berthing, and the transverse displacement and the pile foundation inner force of wharf structure will be changed as well. According to the mechanical characteristics, the ROBOT numerical simulation is used to analyze the mechanical characteristics and the deformation of the both-sidesmooring-berthing high-piled wharf. The applicability of the actual engineering ROBOT calculation is validated,and according to the load combination by more complete calculation and analysis, it is pointed out that for the both-sides-mooring-berthing high-piled wharf, the added back porch impact force has a great influence on the bending moments and shear of straight piles, and the transverse displacement of the wharf will be lager, so we should pay more attention to the structural design of the high-piled wharf.