Objective To establish a high performance liquid chromatography(HPLC)method for determination of icariin in Yishen gao.Methods The analysis was performed on symmetry C18(4.6 mm×250 mm,5 μm),with mobile phase of acetonitrile and water(25 ∶75),and the detective wavelength was at 270 nm.Results The linear range was 0.040-2.062 μg(r=0.9995).The average recovery was 99.78% and RSD was 1.65%.Conclusion The methods is simple,rapid and accurate and could be used for quality control of Yishen Gao.