Abstract: The multi-cyclicity of Xigeda stratum and near-saturation of mudstone within it, which resulted from the sedimentary environment, lead to its engineering characteristics different from other soils. In this paper, authors first characterized moisture content of Xigeda stratum, and then evaluated its effect on engineering properties of soil. At last, it was concluded that uniform correlations exist between moisture content and the four engineering property indexes; maximal dry density ( d max ) ,compacting degree (K), and shear strength parameters (c、) in Xigeda stratum. It was also found that the optimal moisture content is close to natural moisture content of the randomly mixed Xigeda fill.