Abstract: The centrifuge modelling of PCC pile composite foundation is designed for the first time to consider the similarity of material, geometry and pile-soil interaction. The model preparation method which can eliminate many limitations of the existing centrifugal modelling technology of rigid pile composite foundation is well proposed. With special cutting, extraction and backfilling equipment, the operation of soil scraping and extraction, pile driving and backfilling can be realized neatly and efficiently. Therefore, the model preparation disturbance in 1g field can be minimized, and the centrifugal modelling of PCC pile composite foundation is well optimized. The values of Mohr-Coulomb interface friction angle of pile cap versus embankment sand, roughened model pile versus soft soil, and roughened model pile versus underlying soil derived from the direct shear test results are all within a reasonable range, and can reflect the pile-soil contact characteristics of cast-in-situ concrete piles in a reasonable way.