| Definition of the Carboniferous-Permian boundary is one of unsolved problems in China. And it is not agreement with the world, difficulty exists in the comparison of Carboniferous-Permian strata between China and the world. By systematic study on some categories of biotic fossils discovered in the strata of Late Palaeozoic Era, the assemblages of Fusulinid, Conodonts, Foraminiferal, Sporopollen of Carboniferous-Permain are established, and its geologic age is deduced by compare with biological fauna in other areas in North China and other countries .According to the vertical distribution and content variation of fusulinida, conodonts, foraminiferal fossils in the marine-face limestones, three biotic assemblages are established. The fusulinid assemblage sequence can be divided in decending order into 2 assemblages: II TriticitesSchwagerina richthofein subassemblages, I Pseudofusulina firma-Ozawainell idae pseudotingi subassembly-ages; The foraminiferal assemblage sequence can be divided in ascending order into 2 assemblages: II Nodosaria longissima — Geinitzina postcarbanica assemblages, I Palaeotextularia gibbosaeformis — Tetrataxis tenuiseptata assemblages; The conodonts assemblage sequence consists only in 1 assemblage:StreptognathoduselongatesS. wabaunsensisS. gracilis assemblages..By systematic study on the sporepollen assemblages in the Laet Palaeozoic Era in the east part of Liaocheng Coalfield, 110 genera and 308 species of sporopollen fossils have been identified. According to the vertical variation it is divided into 4 assemblages as follows(in descending order): Vi.Torispora securis— Macrotorispora media assemblage, II. Limitisporites rhombicorpus — Alisporites splendens assemblage, II. Gulisporites cochlearius — Sinulatisporites sinensis assemblage, I. Thymospora pseudothiessenii — Laevogatisporites vulgaris assemblage.The percentage of pteridophytes is 89. 93%~94. 12%, pollen 5.88%~10.07%,...
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