A HPLC method have been studied for the determination of oridoninin Donglingcao tablet. The chromatographic system consists of Hypersil ODS column and mobile phase of methanol -H2O (1∶1) with a detection wavelength at 238nm. The method is simple, sensitive, accurate and precise. The oridonin contents can be controlled by control the amout of the leaves in Blushred Rabdosia.