Abstract: The seepage action during the installation of the bucket foundation will affect the penetration resistance of the foundation in the suction penetration process,resulting in inaccurate suction application,and then affect the success or failure of its construction. In order to clarify the seepage field and pore water pressure changes around the foundation during the installation of the bucket foundation,the ADINA finite element software was used to analyze the seepage field in suction penetration leveling process of the single bucket foundation with bulkheads（composite bucket foundation）under different soil conditions and penetration depths. The seepage field of the soil in the bucket under the suction of the CBF is studied,and the seepage field under the inclined condition of the CBF is also analyzed. The seepage failure mechanism of levelled foundation soil is revealed,which provide a reference for the sinking and leveling construction of the CBF in the actual project.