Abstract:Based on the investigation of the flora in Ninepin Group of Hong Kong, there were 140 vascular species belonging to 115 genera and 54 families, of which 5 families, 6 genera and 6 species belonged to Pteridophytes, 48 families, 108 genera and 133 species to Angiosperms, only 1 species to Gymnosperms. The Tropical and Subtropical distribution elements were dominant in this flora. The vegetation types included evergreen broad-leaved shrub、lower subtropical evergreen broad-leaved forest and tropical sand vegetation. The checklist of Ninepin Group plants was reported for the first time, and the characteristic of plant diversity in each island was discussed, the floristics characteristics of the Ninepin Group were also compared with the neighbouring regions, all of these provided some basic references for studying on the flora of Hong Kong.