Abstract: The movements of water and Total Dissolved Salts(TDS)in soils were closely related to the plant community in Aneurolepidium chinense grassland of Songnen Plain. The results of our study showed: that the water conductivity (WC) in the saturated soils,under different communities was 0.0586cm·h-1 (Aneurolepidium chinense), 0.0567cm·h-1 (Calamagrostis epigeios), 0.0175cm·h-1 (Aeluropus littoralis var. sinensis)and 0.0004cm·h-1 (Suaeda corniculata); that the soil matric suction (SMS)was greatly higher under Suaeda corniculata than under Aneurolepidium chinense when the soil moisture was similar; that the amount and velocity of upward moving water in the soil were smaller under Aneurolepidium chinense than under Suaeda corniculata, but those of downward moving water were larger under the former, therefore, it brought about the accumulation of dissolved salts in the uplayer of the soil under Suaeda corniculata,but under Aneurolepidium chinense the amount of dissolved salts decreased quickly with the precipitation in the summer.