Abstract: In this paper the distribution of Late Paleozoic Strata and Fossil plants is introduced briefly and systematically new finded fossil plants are reported from Xilimiao Formation (Angara type) and Dahongshan Fonnation(Cathysian type). Addition to the now reported fossil plants the Late Paleozoic ones in Nei Mongol plateau are mainly distributed in Hanuoaobao Formation(D2), Seribayanaobao Formation(D3), Baolige Formation (C1-C2), Elitu Formation (P1), Baoeraobao Formation (P2), The fossil plants of Xilimiao Formation include Zamiopteris glossopteroides Schm., Sphenopteris sp., S. cf. tunguscana (Schm.) Zal., Pursongica cf. asiatica Zal., Noeggerathiopsis sp. 1, Noeggerathiopsis sp. 2. The flora of Dahongshan Formation is composed of Sphenophyllum oblongifolium, S. speciosum, S. thonii, Pecopteris arborescens, P. condolleana, P. unita, Emplectopteridium cf. alaturn, Callipteridium tachingshanense, Cladophlebis? yongwalensis, Fascipteris sinensis, Sphenopceris sp., Sphenopteridium pseudogermanicum, Cathaysiodendron nanpiaoense, Carpolithus cf. ullatus etc.