Spatial variability and distribution of soil moisture in four plantations in Xiushui County, Jiangxi Province during the hot and dry season was studied using the geostatistical method. Results show that soil moisture varied in spatial variability between the four plantations. The structural variance ratios（C/Co＋C）of the soil moisture in liquidambar formosana plantation and Cornus macrophylla-Toona sinensis mixed forest were 0.55 and 0.73, respectively, suggesting spatial correlation of a medium level. In comparison, the ratio of Firmiana simplex-Alnus cremastogyne mixed forest and Toona sinensis plantation were higher (0.84 and 0.93, respectively), suggesting spatial correlation of a high level. Soil moisture of the mixed forests was lower than of the pure plantation forests in spatial variability on both vertical and horizontal spatial dimensions, but more uniform in spatial distribution. Spatial variability of soil moisture in the 0~10 cm soil layer was greater than in both the 10~20 cm and 20~40 cm soil layers, indicating that soil moisture tend to be uniform with soil depth.