Abstract:The animal experiments in this study showed that Buyang Huanwu decoction as a whole had the best effects, such as dissolving fibrin and increasing the activity of fibrinolysin, based on evidence derived from the uniform design, and the relational grade analysis in gray theory. Of all the ingredients in Buyang Huanwu decoction, Radix Angelicas Sinensis, Radix Paeoniae Rubra and Lumbricus played the most important role.