Abstract: To fully utilize the gravelly soil from the material yard of Huayang River Flood Storage and Detention Area Construction Project (Anqing City) and address the shortage of clay material sources, this study focused on the Wangjiachong material yard′s gravelly soil.Through indoor particle size analysis, permeability tests, and on-site compaction tests, it investigated the particle size distribution range of this soil and its relationship with compaction degree, permeability coefficient, and the number of compaction passes.The test results showed a negative correlation between the compaction degree and permeability coefficient of the gravelly soil, indicated that higher compaction degrees lead to lower permeability coefficients.When the compaction degree reached 95%, the permeability coefficient could be reduced to no more than 1×10^-4 cm/s.By removing large particles and improving compaction, the particle content and permeability coefficient of the gravelly soil can meet specification requirements.The corresponding compaction parameters for gravelly soil were finally proposed as a loose-laid thickness of 30 cm with 2 static passes and 4 vibratory passes, or a loose-laid thickness of 40 cm with 2 static passes and 6 vibratory passes.The research results can provide a reference for the filling of embankment projects in the Huayang River Flood Storage and Detention Area and similar projects.