To explore the correlation between the content of hydroxysafflor A in Xinnao Maishu oral solution and hypolipidemic effect in hyperlipidemia rats. Methods: The content of hydroxysafflor A in Xinnao Maishu oral solution was determined by High Performance Liquid Chromatography(HPLC), and the content of serum cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL-C), high density lipoprotein (HDL-C) in hyperlipidemic rats were determined. Results: The method of hydroxysafflor A content determination is accurate and reproducible. The results showed that there was a certain correlation between the content of hydroxysafflor A and hypolipidemic effect. Conclusion: The content of hydroxysafflor A can be used as the quality control index of Xinnao Maishu oral solution.