A chemical examination of the aerial parts of Euphorbia pekinensis $R_{UPRECHT}$. (Euphorbiaceae) has led to the isolation of seven hydrolyzable tannins and ten fl avonoid glycosides. The former ones have been identified as gallic acid, methylgallate, 3-O-galloyl shikimic acid, 1,3,4,6-tetra-O-galloyl-${eta}-_D$-glucose, 1,2,3,4,6-penta-O-galloyl-${eta}-_D$-glucose, corilagin, geraniin and the latter ones as isoquercitrin, quercitrin, astragalin, afzelin, prunin, rutin, kaempferol-3-O-rutinoside, quercetin-3-O-(2"-O-galloyl)-${eta}-_D$-glucoside and quercetin-3-O-(2"-O-galloyl)-${alpha}-_L$-rhamnoside on the basis of chemical and spectroscopic evidence.