The invention relates to a method for utilizing perennial plant Alhagi sparsifolia in an arid area, and the method is characterized in that an Alhagi sparsifolia plant is utilized properly in the modes of patch-shaped and narrow-band felling according to different districts (desert-oasis transition zones and near periphery of the oasis) in the Alhagi sparsifolia growing period terminal (late autumn) to form an interactive distribution mode of Alhagi sparsifolia retaining plants and Alhagi sparsifolia new plants. On one hand, the new plants can be effectively protected by the retaining plants to ensure that the new plants can normally grow in the severe environment and gradually perform stable protective benefit. On the other hand, the Alhagi sparsifolia plant can be properly used in different modes to harvest certain biomass so as to satisfy forage grass requirements of certain degree in the locality. The overground part biomass of the Alhagi sparsifolia can be harvested to satisfy forage grass requirements, and most Alhagi sparsifolia vegetations can be retained to perform the protection action when wind and sand harms happen in the next spring. Therefore, the target of unifying the condition that periphery perennial plants in the arid area can be effectively protected and reasonably utilized can be realized gradually.