In order to study the spatial distribution characteristics of soil salinity in mixed forest of Yellow River Delta saline land, a new mixed plantation composed of 11 species in Yellow River Delta was taken as the object. The spatial variation of soil electrical conductivity in different seasons and different soil layers (0 -15 cm and 15 -30 cm) was measured and analyzed by traditional statistics and geostatistics. The spatial distribution maps and semi-variograms charts could explicitly explain the random and structural variations of soil electrical conductivity. Results showed that: 1) The mean value of soil electrical conductivity in spring and autumn had a significant difference, and the mean value, either in the upper layer (0 -15 cm) or in the lower layer (15 -30 cm), was larger in spring than in autumn. In spring, the range of soil electrical conductivity in the upper layer was 1.12 - 5.18 mS/ cm with an amplitude of 4.08 mS/ cm, and that in the lower layer was 0.83 -3.72 mS/ cm with an amplitude of 2.89mS/ cm. In autumn, the range of soil electrical conductivity in the upper layer was 0.85 -2.91 mS/ cm with an amplitude of 2.06 mS/ cm, and that in the lower layer was 0.62 -3.05 mS/ cm with an amplitude of 2.43 mS/ cm. The coefficient of variation in spring was larger than that in autumn. 2)In spring, soil electrical conductivity in both the upper and the lower layers had a strong autocorrelation. In autumn, there was no autocorrelation for the soil electrical conductivity neither in the upper layer nor in the lower layer, with an amplitude of 213 m and 71 m, respectively, both exceeding the sampling area. 3)Kriging interpolation indicated that the patchiness of soil electrical conductivity in spring was more serious in comparison to that in autumn.