Abstract: Taking the Permian bioherm section of the Longlin area,Kuangxi Province as anexample,the authors systematically sampled and analysed the different phyla of fossils.From lower to upper of the sectionm,12 assemb ages were clarified for Foraminifera andcalcareous algae by the characterization of their ecology.Consequently,a relation ship between the biocoenose and its sedimentary environments were preliminarily approached,with a view to qualitative and quantitative analyses,the microgeomorphic features for amarine facies were reconstructed.