[Objective] The correlations between characteristics of Alhagi community and soil factors in Danghe River basin were analyzed in order to provide a scientific basis for the effective management of natural Alhagi community and the restoration of degraded Alhagi community in this basin.[Methods] By means of quadrat method, the data of community characteristics and soil samples were surveyed and collected from June to October in 2012. Regression analysis was carried out.[Results] From June to October, the biomass exhibited significant seasonal variation, and the seasonal variations of Simpson's dominance index and Pielou's evenness index were almost accordant, while the Shannon-Wiener diversity index varied differently. In layers of 0-50 cm, with the increase of soil depth, soil electrical conductivity and pH value both increased firstly and then decreased; while soil bulk density increased gradually. In addition, soil water content was observed no increase at 30 cm or deeper layers.[Conclusion] Soil environmental factors showed the major influence upon the characteristics, biodiversity and biomass of Alhagi community. High soil water content could increase the biodiversity of Alhagi community, and high soil bulk density might inhibit the root proliferation of Alhagi.