Four phenanthrene glucosides were isolated from tubers of Bletilla striata. The structures were elucidated as 2,7-dihydroxy-4-methoxyphenanthrene-2-O-glucoside, 2,7-dihydroxy-4-methoxyphenanthrene-2,7-O-diglucoside, 3,7-dihydroxy-2,4-dimethoxyphenanthrene-3-O-glucoside and 2,7-dihydroxy-144'-hydroxybenzyl)-9,10-dihydrophenanthrene-4'-O-glucoside, on the basis of spectroscopic data.