The south coastal area of the Laizhou Bay is seriously subjected to soil salinization as a result of seawater intrusion. Soil salinization has become a major factor that hinders the regional agricultural production and development. In order to explore rules of the spatial distribution of salt ions and dominant salt ions in soil profiles in the research area, 14 sampling sections were arranged at 6km intervals in this study, containing 76 soil profiles. Soil samples were collected from the 0~30cm, 30~60cm and 60~90cm soil layers, separately, of each profile. A portion (about 1/3) of each sample was taken out from the same soil profile and blended into a mix for analysis. Classical statistical and geo-statistical methods were used in combination to analyze statistical characteristics and spatial distribution of salt ions in the soil profiles in the area. Cluster analyses of the soil ions were also done. Results show that within the 0~1m soil layer, soil salts displayed an obvious trend of accumulating in the bottom; The dominant soil salt ions in the research area were Na⁺、SO4^2- and Cl^-, existing in the form of NaCl and Na₂SO₄. These findings may serve as reference for the future researches on monitoring and assessment of soil salinization in this area. The analyses of the three ions in the soil has fully explained the problem of soil salinization in the south coastal area of the Laizhou Bay. Partial correlation analysis of the salt ions in the soil shows that the ions varied sharply . Cluster analysis indicates that the salt ions in the soil consisted mainly of three categories of salt ions: Category I: K , Mg² , Ca² and SO₄^2-; Category II: Na , and Category III: Cl^-. The total salt content displayed a moderate spatial autocorrelation in the 30~60cm soil layer, and strong ones in the other two layers, which suggests that the spatial variation of the soil salt properties was mainly affected by natural factors. Spatial distribution of the salt ions in the soil appeared in pattern of strips and patches. Ca² concentration was relatively high in the middle, and slightly lower in the northern and southern parts of the region; Mg² was relatively high in the southern and western parts and relatively low in the northern part; K was relatively high in the northern part and low in the central part; while Na 、SO₄^2-and Cl^- was quite similar in spatial distribution, appearing to be high in the central part, relatively low in the northern part and lower in the southern part. SAR was quite similar to Na in spatial distribution pattern. The soil salinization in this region was mainly of the types of sulfate, chloride-sulfate and sulfate-chloride, and was quite low in degree in most parts of the region and moderate in some parts, leaving some small areas of severely salt-affected soil, saline soil and non-salt-affected. The research findings may have guiding significance for agricultural production in the region, as well as for scientific amelioration and comprehensive utilization of salt-affected soils in the study area.