Abstract: The Shanwang Basin is located at 36ºN, l18ºE, and is an interior lake basin of middle Miocene age which contains abundant plant and animal fossils. Many researches on plant megafossils, spores and pollen, fungi and diatoms have been done since 1940' s. Since Shanwang Miocene Flora covers a critical time period for global climate change, further work about its topography, palaeoecology and palaeoenvironments will be very important in explaining the cause of Miocene climate change.