Abstract: Acanthodian scales were discovered from the Shanjiang Formation and the Alengchu Formation (Early Devonian) in Alengchu area, Mingyin District, Lijiang County, Yunnan, China. 4 scale genera and 5 scale species are described with 1 new genus and 2 new species. This is the first report on the occurrence of acanthodian fossils in Tibet2western Yunnan region. Different from the Early Devonian acanthodian constitution in South China region, the Early Devonian acanthodian assemblage at Alengchu mainly consists of the genera and species of Climatiida, lacking representatives of Ischnacanthida. It suggests many similarities to the assemblage of the same age in Centeral New South Wales, Australia. This paper is from the author’s master thesis supervised by Professor Wang Nianzhong. The materials described are housed in the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Beijing, China.