Abstract: Water Potential(WP), bound water content(BWC), free water content(FWC), transpiration rate(TR) and water holding capacity(WHC) of leaves or assimilating twigs have been measured for five sand fixing plant species-Haloxylon ammodendron, Tamarix ramosima, Elaeagnus angustifolia, Populus gansuensis and P.nigra var.thevestina and thred xerophytes-Reaumuria soongo-rica, Salsola passerina and Ephedra przewalskii. The features of water relation and the ways of adaptation to drought environments in each of them arediscussde briefly.