Objective:To investigate the application value of thromboelastography (TEG) in choosing antiplatelet drug for patients with cerebral arterial thrombosis.Methods: 100 new patients with cerebral arterial thrombosis, who received single antiplatelet therapy after received dual antiplatelet therapy (aspirin and clopidogrel) in acute stage (14d), were randomly divided into observation group (50cases)and control group (50cases). According to different method of choosing drug, patients of control group randomly were implemented different single antiplatelet drug, while patients of observation group received more sensitive antiplatelet drug based on TEG results. The follow-up observation about recurrent situation of cerebral arterial thrombosis for the two groups were carried out in further study.Results: In one year, the recurrence rate of cerebral arterial thrombosis of observation group (6%, 3/50) was significantly lower than that of control group (20%, 10/50) (x2=4.332,P<0.05). The differences of recurrence rate between different antiplatelet drug in intra-group were not statistically significant.Conclusion: TEG can efficiently evaluate the therapeutic effect of antiplatelet drug, and guide the selection for drug so as to reduce the recurrence rate of cerebral arterial thrombosis.