Abstract: Feruloyl esterase can catalyze the cleavage of ester bonds between ferulic acid，dehydrodimers of ferulic acid and hemicelluloses which form cross-linked structure，so it would help ruminant microbes increase cell wall digestibility. In this review，basing on analyzing and concluding the methods to isolate and screen strains producing ferulic acid esterases and different FAE expressing systems，we try to expound the topological structure of the protein，as well as recent research on its mechanism and evolution by bioinformatics methods. 

Key words: plant cell wall; feruloyl esterase; enzyme expressing systems; enzyme topological structure