OBJECTIVE: To establish the method for simultaneous determination of berberine hydrochloride and baicalin in Jianpi zhixiening granules. METHODS: HPLC switching walvelength method was adopted. The determination was performed on Hypersil BDS C18 column with mobile phase consisted of methanol-0.45% phosphoric acid solution-triethylamine (50 ∶ 49 ∶ 1,V/V/V) at the flow rate of 1.0 mL/min. The detection wavelength was set at 265 nm (berberine hydrochloride) and 280 nm (baicalin). The column temperature was set at 30 ℃, and sample size was 10 μL. RESULTS: The linear range of berberine hydrochloride and baicalin were 60.3-312.8 ng(r=0.999 7) and 81.5-368.9 ng(r=0.999 9). The limits of quantitation were 0.666 8,0.774 0 ng, and the limits of detection were 0.222 6,0.258 0 ng, respectively. RSDs of intermediate precision, stability and repeatability tests were all lower than 1.0%. The recoveries were 96.48%-99.30%(RSD=1.06%,n=6) and 95.20%-99.39%(RSD=1.66%,n=6), respectively. RSDs of durability test were all lower than 2.0%. CONCLUSIONS: The method is simple, precise, stable, reproducible, accurate and durable. It can be used for simultaneous determination of berberine hydrochloride and baicalin in Jianpi zhixiening granules.