Abstract:Soil salt contents, salt composition and electrical conductivity changes of three kinds of landforms in low Haihe River, i.e., alluvial plain, transition between alluvial and coastal plain, coastal plain were studied. The results showed that in the alluvial plain the desalinization in surface layer was noticeable, but salt content in the subsoil layer was still high, predominant salt anion in the soil were Cl- and SO42-. In transition between alluvial and coastal plain as well as coastal plain, salt content of top soil was high, predominant salt anion in the soil was Cl-. Na+ and K+ were predominant salt cations in the soil, which indicated that the dominant soluble salt was NaCl, followed by Na2SO4 and CaCl2。