Characteristics of soil profile and vegetation distribution pattern in micro scale(a 32 m long transect) in sodic alkaline soil region were discussed.Results showed that soil distribution patterns along the transect from low land up to upland were sodic saline meadow soil

shallow columnar sodic alkaline soil

white crust sodic alkaline soil

and mid columnar sodic alkaline soil.Vegetation included Ranunculus cymbalaria Pursh /Polygonum aviculare L community

Potentilla anserina L community

Carex duriuscula C.A.Mey/Leymus chinensis Tzvel community

bare land

and Leymus chinensis Tzvel/Puccinellia tenuiflora Scrib.Et Merr./Chloris virgata Swarta community.The Ranunculus cymbalaria Pursh /Polygonum aviculare L community and Carex duriuscula C.A.Mey/Leymus chinensis Tzvel community were distributed around the shallow basin in ring-like pattern;bare land and Leymus chinensis Tzvel/ Puccinellia tenuiflora Scrib.Et Merr./Chloris virgata Swarta community were distributed in patch pattern.Bio-diversity and coverage of vegetation along the margin of shallow basin were maximal and its biomass was highest.Vegetation in micro flat upland was dwarf and with lower biomass.The salinity in bare land could reach as high as 3.38% and soil structure was extremely compacted.Therefore

the production of vegetation was restrained.