The physicochemical parameters, major ions and heavy metals of the Quaternary cultivated and uncultivated soils in Siwa Oasis were quantitatively determined. Bivariate and multivariate statistical analyses were applied to clarify the relationship between the investigated metals and soil properties and identify the potential sources of these metals in Siwa Oasis soils The geochemical characteristics of SiwaOasis soils are controlled by several factors,including the nature of parent rocks, geographic location, soil-forming processes, extent of drainage and leaching, effects of saline near-surface groundwater and agriculture practices.