Abstract: 8 communities patches on salinization grassland were studied by the dominance, diversity and community characteristics.The purpose of this paper was reveal to the structure and variation of grassland community patches in the succession process, further provide the theoretical basis to grassland restoration and salinization grassland restoration. The results showed that the species composition and dominance of 8 community patches were more obvious different, the Margalef species richness index and Shannon-Wiener diversity index were significant different between the patchⅡ,Ⅲ and Ⅰ,Ⅳ,Ⅴ,Ⅵ,Ⅶ,Ⅷ (P＜0.01), the Simpson dominance index and Pielou uniformity coefficient were significant different between the patches Ⅱ,Ⅲ and Ⅵ,Ⅶ,Ⅷ(P＜0.01), the community similarity coefficients of the patch Ⅶ and Ⅷ, Ⅵ and Ⅶ, ⅣandⅤ were largest, respectively 0.956 7, 0.929 7, 0.903 4. There were two groups of community patches. Patch Ⅰ,Ⅱand Ⅲ were a groups, which soil moisture, bulk density, pH value and salinity were lower, the dominant plant is Leymus secalinus. With the drying of soil, some weak drought-resistant species disappeared from the community, while drought-resistant L. secalinus occupied dominant status in the group patches, there becomed community patches which dominant plant was L. secalinus. Others were in another group, the dominant plants were Potentilla anserina and Casuarina cunninghamiana.