Based on investigation and research on the natural secondary forests in limestone mountains of Suzhou administrative area in Anhui Province,the author clarified the communities types and got the following results:(1)The vegetation of the natural secondary forest in the limestone mountains of Suzhou administrative area were clarified into 2 vegetation types,11 formations,16 associations;(2)Some deciduous species of Fagaceae such as Quercus variabilis,Castanea mollissuna,Quercus acutissima and species of Ulmaceae such as Pteroceltis tatarinowii were mostly dominant species in the study area.