Abstract: Provided are a Haemadipsa sylvestris antithrombotic peptide Sylvestin and the use thereof, falling within the technical field of biomedicine. The Haemadipsa sylvestris antithrombotic peptide sylvestin can inhibit FXIIa and kallikrein, has anti-thrombus/infarction effects and alleviates injuries caused by cerebral ischemia, and can also be used in the preparation of inhibitors of FXIIa and kallikrein and drugs for anti-thrombus/infarction and anti-cerebral ischemic injuries.

Abstract: A use of 3,4,7-trihydroxyisoflavone or 3-methoxydaidzein is provided for implementation in preparation of a drug for inhibiting platelet aggregation. The 3,4,7-trihydroxyisoflavone or 3-methoxydaidzein has a significant inhibition effect on platelet aggregation, and bleeding test conducted with these embodiments show that all of the mice administrated with 3,4,7-trihydroxyisoflavone and 3-methoxydaidzein did not show any significant hemorrhagic activity, while the control group, i.e., the group administrated with the same concentration of clopidogrel showed very significant hemorrhagic activity. Thus, the use of such a drug of the present invention is useful in inhibiting platelet aggregation, and the use of such a drug can reduce the risk of bleeding, is safe for use, and expands the clinical and medical applications thereof.