To boost food production in coastal regions, a study was carried out to analyze relationships between soil properties and wheat production. For that end, soil samples were collected in the soil layer (0~20cm) of salinized wheat fields for determination of soil physicochemical properties, and wheat yield and biomass of the sampling sites were monitored. Results show that yield and biomass of wheat was significantly and negatively related to soil salt content (p<0.01), and the relationsip fitted a cubic equation well. If 4 500 kg hm^-2 was set as the minimum target yield, salt content in the soil should be lowered below 3.1 g kg^-1. Soil salt content was significantly and negatively related to organic matter content in the soil, while yield and biomass of the wheat crop was significantly and positively related to that (p<0.01), which suggests that increasing soil organic matter content can reduce soil salt content and boost wheat production. To evaluate of effect of soil organic matter suppressing soil salinity, ratio of soil salt content in the sub-surface soil layer (>10~20 cm) to that in the surface layer (0~10 cm) was used as salinity suppressing efficiency (E ). The relationship between E and organic matter content in the surface soil fitted a quadratic functional equation well. The effect of organic matter on suppressing soil salinity became obvious, when soil organic matter content in the surface soil was increased up to or higher than 19.1 g kg^-1, which can, therefore, be set as a target value for soil fertility building of saline soil. Besides, increasing soil readily available K content can significantly boost wheat production, too, in saline soil. In a word, the findings of this study are of great significance to soil building and grain production in the studied and similar regions.