There are 181 species of pteridophytes detected in limestone regions on Hainan island,which belong to 70 genera and 37 families according to the taxonomic system of Ching Ren-chang in 1978.According to the main uses and ecological characteristics of the pteridophytes in limestone regions on Hainan island,they can be classified into 4 types,viz.medicinal pteridophytes,ornamental pteridophytes,edible pteridophytes and indicator pteridophytes of limestone regions.Introduction and suggestions of exploitation,utiliztation and conservation of these pteridophytes are given in this paper.