Abstract: On the basis of systematic sampling and chemical soaking treatment, 108 species belonging to 41 genera (including 9 new species, 38 unknown species, 1 new genius) of microplants fossils were discovered from 80 samples of the Gaoyuzhuang Formation in Kuancheng area, totally about 5000 individuals, including abundant metaphyte and their fragments. According to the distribution and features of these microfossils, four fossil assemblages were recognized. There are some obvious differences between the fossils from Changcheng System and those from Gaoyuzhuang Formation. The research on these fossils provides important information for the evolution of organic evolution, regional stratigraphic division and correlation as well as biogenic mineralization and oiliness.On the basis of systematic sampling and chemical soaking treatment, 108 species belonging to 41 genera (including 9 new species, 38 unknown species, 1 new genius) of microplants fossils were discovered from 80 samples of the Gaoyuzhuang Formation in Kuancheng area, totally about 5000 individuals, including abundant metaphyte and their fragments. According to the distribution and features of these microfossils, four fossil assemblages were recognized. There are some obvious differences between the fossils from Changcheng System and those from Gaoyuzhuang Formation. The research on these fossils provides important information for the evolution of organic evolution, regional stratigraphic division and correlation as well as biogenic mineralization and oiliness.