Finite element procedure ANSYS was used to analysis internal force of a pile-gravity type complex wharf under different load effect. Choosing two different ground-based models to simulate the interaction between caisson and foundation, the results show that Terminal structure internal forces is basically the same except some different in caisson bottom under Winkler foundation model and the model half-space foundation.The stress of the node which is in the location of piles and caissons connected is very large, so it is necessary to strengthen in this place.