Abstract: Abstract: In 1992, according to the fossil assemblage zones, magnetic approach and oxygen? Juan carbon isotope studies Ding divided the Upper Carboniferous to Lower Permian strata into five stages. In this paper, on the basis of Ding's division with some modification, the authors divide the upper Upper Carboniferous into the Xiaoyaoan Stage and Lower Yangjjiahean Stage and the Lower Permian into the Upper Yangjiahean Stage, Fanjiahean Stage, Yakouan Stage and Longlinian Stage. The first five stages were established by Ding et al. in 1992, while the last stage was reported by Huang et al. in 1982. The authors give a clear and definite definition of the stages, characterize the faunas and magnetostratigraphy and clarify their relations to the related strata. The stages thus distinguished can all be correlated with the standard chronostratigraphic units of the world in details and on well-established grounds.