Objective:To observe the clinical efficacy of Xueshuantong combined with the conventional treatment and the impact on fibrinogen (FIB) and D-dimer in the patients at acute exacerbation of chronic obstructive pulmonary disease (AECOPD).Meth-ods:Totally 218 cases of AECOPD inpatients were divided into the observation group and the control group randomly .The control group received the conventional therapy , while the observation group was intravenously treated with 250 mg Xueshuantong lyophilized powder dissolved in 250 ml 10%glucose injection additionally .The treatment course was 14 days.The changes of FEV 1 , FEV1/FVC, FIB and D-dimer in the two groups after the treatment were compared , and then the clinical efficacy of the two groups was evaluated . Results:After the treatment, the levels of FEV1 , FEV1/FVC, FIB and D-dimer in the two groups were significantly improved when compared with those before the treatment , and the changes in the observation group were more significant than those in the control group (P<0.05).The total effective rate of the control group was 80.73%, and that of the observation group was 89.91% (P<0.05). Conclusion:Anticoagulant therapy using Xueshuantong on the basis of the conventional therapy can significantly reduce the amount of fibrinogen and D-dimer serum fiber in AECOPD patients , which is helpful to improving the hypercoagulable and fibrinolysis state and the lung function of AECOPD patients .