Much more than ordinary heparin. In clinical applications show its anti Ⅹ a activity is strong and durable, and the effect of prolong APTT faint. Therefore, it shows strong antithrombotic effect and low risk of bleeding. In addition, dheparin sodium can also promote fibrinolytic effect, through binding with vascular endothelial cells, protect endothelial cells, enhance anti-thrombotic effect, and have less impact on platelet function and lipid metabolism than ordinary heparin.