Abstract:The contents of baicalin in four different traditional Chinese medicinal preparations of Ying Huang were deter-mined by HPLC. The contents of baicalin in Ying Huang tablets,Ying Huang oral liquid,Ying Huang injection andYing Huang granules are respectively:124. 18mg/g,21. 12mg/ml,12.39mg/ml and 6.79mg/g. The HPLC methodsuggested in this paper can be used for quality control in the preduction of Ying Huang preparations.