Abstract: The contents and the distribution features of K, Na, Ca, Mg elements in different parts of Alhagi sparsifolia in a saline meadow in the desert region of Xinjiang plain were measured, their interrelations were analyzed. The results showed that these elements had different functions in different organs of the plant. The contents of K and Na in the aboveground part, especially in the leaves, indicated that the species had mechanisms to absorb potassium and Sodium selectively.