In the 4th century BC, Aristotle recorded some crustaceans in his works. 1777, Pennant first used the word "crustacean" as a kind of arthropod; 1806, French P.-A. Latreille divided crustaceans into two subclasses: soft armor subclass and soft armor subclass. 1837, H. Milne-Edwards of France listed xiphophora and trilobite in the natural history of crustacea. In 1883, under Crustacea, Bojas established five subclasses: Branchiopoda, Oyster, Copepoda, tendril and soft armor. This is the embryonic form of modern crustacean classification, which has been used to this day. From 65438 to 0960, Physiology of Crustaceans, edited by T. wortmann, comprehensively summarized the research results before the 1960s. Since 1960s, the research on crustaceans has made rapid progress, especially in physiology, biochemistry and experimental ecology. With the discovery of many new life species and fossil species, the publication of a large number of papers on comparative morphology and life history, and the in-depth study on the origin, evolution and classification system of crustaceans, many scholars believe that the classification status of crustaceans should be raised to the level of superfamily, subfamily or phylum. T. E. Bowman and L. G. abel comprehensively summarized the research results in recent years in Modern Crustacean Classification (1982) and put forward a new classification scheme. Crustacean Biology, edited by D.E. Bliss, is a representative monograph at present, with 8 volumes published, as many as 1983.