Objective: Study the pharmacodynamic substance with hemostasis to illuminate the mechanism of charring of Japanese thistle herb.Methods: Capillary tube method was adopted to screen the extracted parts with hemostasis from charred Japanese thistle herb.The flavonoids were considered the most possible parts with hemostasis and abstracted the active component again.Results: In charred Japanese thistle herb,the flavonoids do have the effect of hemostasis and the active component was pectolinarigenin rather than...