Abstract:Fern flora of Mt Wutongshan in Shenzhen of Guangdong Province comprises 126 species and two varieties of 63 genera in 33 families. The species-rich families are Polypodiaceae, Thelypteridaceae, Dryopteridaceae, Selaginellaceae, Athyriaceae and Pteridaceae, each of the six families contains over eight species. Phytogeographically, the pteridophyte species of Mt Wutongshan can be divided into nine areal types and six subtypes, and the main elements are of Tropical Asia distribution and Eastern Asia distribution. The fern flora is of tropical nature about 67% are tropical species.