Abstract: For the slipped soft soil foundation in the storage yard of a wharf, the root pile-net composite foundation is used for reinforcement. The geotechnical centrifugal model tests are carried out to study the deformation and pile-soil stress characteristics of the root pile-net composite foundation under super-large loads. The foundation, root piles, reinforced cushions, dust nets, track beam foundation and ore loads are simulated. The variation laws of deformations and loads at the top of the root piles, the earth pressures between the root piles and the pile-soil stress ratio of the composite foundation are analyzed under super-large loads. The settlement of the composite foundation meets the requirements of the storage yard. The horizontal displacements and settlements of the dust net foundation and the track beam foundation are small. The pile-soil stress ratio is 60~69. The test results show that the root pile-net composite foundation in the slip zone is stable and safe under the load of 350 kPa, and the foundation reinforcement has achieved the expected effects.