Abstract: The use of salt glands to excrete excess salt carried by the aboveground parts of plants is one of the important mechanisms for salt-tolerant plants to adapt to soil salinization.A large number of domestic and foreign studies have shown that there are typical salt gland structures in salt-tolerant plants of Poaceae.In order to find out the salinity and alkali tolerance mechanisms of gramineous crops and improve their salinity and alkali tolerane function.This article provided an overview of the morphology and structure of the salt glands of the Poaceae,mechanism of salt excretion in typical bicellular salt glands of Poaceae,functional characteristics of two-celled salt glands expelling ions from the body,factors affecting the ability of salt excretion and prospect of further development of salt gland utilization in the future.The stress resistance function of salt glands can improve the salt resistance and heavy metal resistance of gramineous plants,balance the content of ions and heavy metals in crops,and finally improve the yield and quality of crops.The mechanism of salt excreted from the salt glands of gramineous plants on photosynthesis and resistance to pests and diseases will be a research hotspot in the future.