Abstract: Miospores are abundant and well-preserved in the type section of Late Devonian and Early Carboniferous strata in the Lower Yangtze Valley. Based on an extensive study of the Miospores zonation in the Late Devonian and Early Carboniferous strata in the Lower Yangtze Valley, the author holds that there exist seven Miospore assemblege zones, comprising three Late Devonian zones and four Early Carboniferous zones: 1)Rugospora flexuosa-Grandispora cornuta(FC) zone; 2)Vallatisporites pusillites-Retispora lepidophyta (PL) zone; 3)Retispora lepidophyta-Verrucosisporites nitidus(LN) zone; 4)Vallatisporites verrucosus-Retusotriletes incohatus (VI) zone; 5)Spelaeotriletes pretiosus-Cingulizonates bialatus(PB) zone; 6)Schopfites claviger- Auroraspora macra (CM) zone; 7)Lycospora pusilla (PU) zone. A palynological characterization of the Devonian-Carboniferous boundary has, until now, been based on the disappearance ofRetispora lepidophytaand Vallatisporites pusillites.It is quite clear thatVallatisporites verrucosus-Retusotriletes incohatus(VI) zone should beling to Carboniferous, and the boundary between the Devonian and Carboniferous strata in Lower Yangtze Valley should be located at the bottom of the Chenjiabian Formation. The Devonian and Carboniferous miospores undoubtedly play an important role in stratigraphical subdivision and correlation as well as in reconstruction of palaeogeography, palaeontology and palaeoclimates. On the basis of palynological data, the author reassessed the age of the Guanshan Formation and assigned this formation to Late Devonian, and confirmed that theRugospora flexuosa-Grandispora cornuta (FC) zone should correspond to the Upper part of Famennian Formation (Fa2c-Fa2d).