[Objective] The characteristics of soil salinization on the coastal wetland of Jiaozhou bay were studied to provide scientific basis for coastal wetland conservationof Jiaozhou bay and regional soil salinization prevention.[Methods] Based on the tests of soil pH value, conductivity and main salt concentration of layered soil samples, four typical coastal wetlands of Jiaozhou bay including Phragmites australis wetland, Suaeda glauca wetland, the barren wetland and Spartina anglica wetland were sampled in August 2014.[Results] The soil salt contents ranked as:Phragmites australis wetland < Suaeda glauca wetland < barren wetland < Spartina anglica wetland, the salinization type of the above transited from sulfate-chloride type to chloride salinization soil type. In terms of the vertical distribution, soil salinity were obviously accumulated at surface soil layer in Spartina anglica wetland and Phragmites australis wetland; while soil salinity was accumulated at deep soil layer in Suaeda glauca wetland and barren wetland. Except for CO₃^2- and HCO₃^-, other main salt ions contents in coastal wetland of Jiaozhou bay were consistent with total salt content and conductivity. Main salt ions contents in soil ranked as:Cl^- > Na⁺+K⁺ > SO₄^2- > Mg²⁺ > HCO₃^- > Ca²⁺.[Conclusion] The coastal wetland soils of Jiaozhou bay had severe soil salination, and the soil salt content increased from Phragmites australis wetland to Spartina anglica wetland. The wetland soils in Jiaozhou bay was non-alkalized and the sample salt contents in it varied oppositely, whereby, the wetland plants were affected by the potential poisons of soda alkalized soil.