Abstract: The grain size composition,distribution characteristics and spatial variability of soil in seven typical plant communities in Ebinur Lake wetland were studied by geo-statistical method．The results showed that：（1）The dominant grain size in Halocnemum was very fine sand，Haloxylon was fine sand while others were silt．Apart from the weak variability in Phragmites，Populus euphratica and Haloxylon communities，soil granularity had medium variability in other communities. Most communities had poor sorting characteristics except Haloxylon．Skewness was negative， Kurtosis was narrow．（2）With the soil depth increasing，soil particle size in Suaeda，Phragmites，Tamarix，Populus euphratica and Halocnemum showed that larger at the bottom than that at the surface，while Lycium ruthenicum on the contrary．Soil particles in Haloxylon layers had small differences，but each of them had different characters．（3） As for the correlations of soil particles among seven kinds of plant communities，the correlations with soil salinity in Phragmites communitiy was weak，while others were strong．The correlations with soil moisture in Phragmites and Lycium ruthenicum communities were negative，while others were weak．（4）The soil grain size characteristics in different plants were affected by wind，seasonal flood，fluctuation of lake area，soil type and soil parent material.