Abstract:To establish a simple and reproducible method for determination of astragaloside in Astragali Radix.Methods:Four extraction methods were used and compared. The content of astragaloside was determined by HPLC-ELSD with a Capcell PAK C18(4.6 mm×250 mm,5 um)and a mobile phase of acetonitrile -water(32:68).Results:Using the simple extraction method, the linear relation was good with the range of 0.53~12.72 ug(r=0.999 4).The average recovery was 98.91% with RSD=2.10%.Conclusion:The improved method is simple, accurate, and reproducible and can be used for the determination of astragaloside in Astragali Radix.