Five flavonoids have been isolated from Kummerowia striata(Thunb.)Schindle.They were identified as apigenin,quercetin,apigenin-7-O-β-D-glucopyranoside,kaempferol-3-O-3-β-D-glucopyranoside and apigenin-7-O-neohesperidoside on the basis of their physical and chemical properties together with the spectrometric analysis.