RESUMEN
Objective To compare the four kinds of Yinqiao Powder prepared by archaic decoction,Japan standard decoction,medical institution decoction and decoction combined archaic with modern technology,select the best method and provide the important theory basis for standardization of decoction technics of diaphoretic recipes.Methods The major contents of traditional Chinese medicine were determined by HPLC and used as the evaluating indicator as well as the ratio of dry extraction.Results The method of archaic decoction got the highest synthetic scores,and the validating experimental result was stable.Conclusion The preparation method of archaic decoction could be used as the reference standard for preparation technology of Yinqiao Powder,in order to further standardize the preparation of the standard decoction of diaphoretic recipes.