Abstract: The fossil bodies of Longfengshania are composed of the tow part with foliate and sub-leafstalk fixed organs, and thus the author considers that the genus represents the fossils of marine sessile multicellular Mataphyta with possible relationships to the Phaeophyta and Chlophyta. According to the morphological characteristics, biogenetic law and palaeoecology, the algal body of genus Longfengshania Du is composed of three parts with blade, stripe and holdfast, belonging to Phyllum Phaeophyta, Order Laminariales, Family Longfengshaniaceae. The initial solution of systematic texology of genus Longfengshania Du is of important significance in the study of biology and palaeontology.