Objective: To determinate the content of przewatanshinquinone in salvia miltiorrhize with HPLC. Method:Column: KromailsC18 (250mm×4. 6,5μm); mobilephase: methanol-0. 5%aceticacid(1: 5); flowrate:1.0ml/min; temperature:room temperature; detective wavelength: 280nm. Result: Y=6. 3101×10-4X-0. 7864 (r=0. 9994), linearityrange: 14. 47~72.36μg/ ml. The content of przewatanshinquinone was0. 38% inthisgroup, averagerecoverywas98. 6%, RSD=1. 6%. Conclusion: This method could beused as the quality control stan...