The soil water diversity of typical semi-natural savanna during the middle-end rainy season is researched on the base of lots of trials, including the soil water content spatial and temporal diversity qualities of slimy dry-laterite, the comparison of soil water content spatial and temporal diversity qualities of slimy dry-laterite to loose dry-laterite, the soil water content spatial time diversity qualities of loose dry-laterite under different of vegetation and the soil water content spatial diversity qualities in different landform in valley.