Abstract: Living things throve in Devonian strata of the nappe, and their species
were numerous .In Lower and Middle Devonian there were rich brachiopods,
and then corals, bivalves, triobites and cephalopods.The carbonate strata
in .Middle and Upper Devonian contained abundant conodonta, specially Pulma--toEepis, Through analysis and research, we have divided the fossils into ten fossil zones and assemblages.The ten fossil assemblages showedin the dend-rogram of cluster analysis tally with them, by which we can make regional correlation .According to this, we have classified stratigraphical units, def-fined the boundary of Devonian series, and described the characteristics of fossils.

Key words: Biostratum Fossil zone and assemblage Devonia