Abstract:Plant polysaccharides are essential biomacromolecules for plant life processes,and the research primarily focuses on their extraction and isolation,structural modification,structural analysis,biological activities,etc. Enzymes,as common biological catalysts,are increasingly widely applied in the research on plant polysaccharides for their high efficiency and specificity. This paper reviewed the structural information of various polysaccharides found in plants,including starch,cellulose,pectin,and hemicellulose. It also introduced the classification and modes of action of enzymes such as amylases,cellulases,pectinases,and hemicellulases.Additionally,the research progress on the application of enzymes in the extraction and purification of plant polysaccharides,their structural modification,and their utilization in structural analysis was summarized. This paper aimed to deepen our understanding of enzymes and plant polysaccharides and highlight their significant relevance in the development of food,medicine and other related fields.