Objective To investigate the antithrombotic effects of polydatin.Methods Injection of arachidonic acid into mouse,electrically stimulated carotid artery and inferior vein ligation in rats were used to evaluate polydatins antithrombotic effects respectively.Results Polydatin presented obvious antithrombotic effects in three thrombotic models and showed a good dose-effect relationship.Conclusion It is suggested that polydatin has evident antithrombotic effects in artery,vein and micro-circulation.