To study the quality standards of Semen oroxyli. Methods： Characteristic identification, microscopic identification and thin layer chromatography (TLC) were adopted, and baicalin was used as reference control. Analysis was given according to the standards on moisture, total ash, insoluble ash and impurity in acid, alcohol–soluble extract in Chinese pharmacopoeia (year 2000 edition). Results： The contents of moisture and alcohol-soluble extract of the five bunch of medicine sold in market all complied with the standards of Chinese pharmacopoeia. The Semen oroxyli in Yunnan had the most contents of alcohol-soluble extract, accounting for 31.09%. The range of contents of total ash, insoluble ash and impurities of the Semen oroxyli were identified to be 3.16% to 3.99%, 0.01% to 0.06%, and 0.04% to 0.09% respectively. Advises on its content limit was proposed. Conclusion： These results can provide references for further studies on the quality standards of Semen oroxyli.