Abstract: Based on the research background of pile-net composite foundation of the heavy-load storage yard of a wharf, the centrifugal model tests and three-dimensional numerical simulations are carried out to study the deformation and stress characteristics of the pile-net composite foundation under heavy loads. The results show that the values of foundation deformation, axial force at pile top, pore water pressure and pile-soil stress ratio obtained by the centrifugal model and numerical simulation are in good agreement, and the two methods can be complemented and verified for each other. Under the heavy loads, the displacement of the pile-net composite foundation is mainly the vertical settlement component, and the horizontal displacement component is small. The change rate of displacement meets the control requirements of yard stability.The pile-soil stress ratio in the composite foundation is between 20 and 40, and the CFG piles share more than half of the loads of the overlying storage yard, playing a key role in load sharing.