To develop and utilize wetland soil resources and ecological environment construction in the Yellow River Delta, a one-way variance analysis (ANOVA) and canonical correspondence analysis (CCA) were applied to analyse the seasonal distribution characteristics and quantitative relationships of total salt content (TS), ion composition, pH value, sodium adsorption ratio (SAR), and electrical conductivity (EC) in the surface layer (0-10 cm) of the soil profile. The results indicated that:(1) the soil of the study area belonged to the type of heavy solonchak,the mean soil salinity was more than 17.9 g/kg in spring (May), summer (August), and autumn (October) and the salt content in May and October was higher than that in August, which caused salification in spring and autumn and desalination in summer. (2)The dominate cation and anion of the soil were Na⁺ and Cl^-, respectively, Mg²⁺ expressed strong variability in summer and autumn and Cl^- in autumn, the other ions showed moderate intensity variation in different seasons. (3) Correlationships between Cl^- and Na⁺, Cl^- and Mg²⁺, and SO₄^2- and K⁺ were significant in May and Cl^- and HCO₃^-, SO₄^2- and Mg²⁺, SO₄^2- and Ca²⁺, Ca²⁺ and Mg²⁺ in August, and Cl^- and SO₄^2-, SO₄^2- and Mg²⁺, and Ca²⁺ and Mg²⁺ in October. (4) pH values varied between 7.7 and 8.1 and were less influenced by ions and more uniformly distributed in all three seasons. SAR varied between 3.08 and 5.29 and it was strongly influenced in May and K⁺ in August. It was weakly influenced by any ion and was distributed evenly in October. EC varied between 7.16 and 13.04 mS/cm and it was weakly influenced by ions in the soil and was distributed uniformly in May. However, it was significantly influenced by SO₄^2-, Ca²⁺, and Mg²⁺ in August, and Na⁺ in October. The seasonal variation in TS was coincident with Cl^-, Na⁺, and Mg²⁺, and Cl^- was the major factor controlling spatial distribution of soil total salt throughout all of three seasons. Therefore, controlling or reducing the Cl^- source is an optional approach to alleviate soil salinization in the wetlands of the Yellow River Delta.