Abstract:〔Abstract〕 Objective To observe the effect of dual antiplatelet therapy on posterior circulation ischemic stroke. Methods A total of 56 patients with posterior circulation ischemic stroke admitted to Xinmi First People's Hospital from August 2018 to August 2019 were selected as the research objects, and the patients were divided into control groups according to different treatment options (28 cases: single Application of aspirin) and observation group (28 cases: aspirin, clopidogrel dual antiplatelet therapy), compare the prognosis of the two groups of patients. Results The scores of the National Institutes of Health Stroke Scale (NIHSS) of the observation group after 1 week of continuous medication and 3 weeks of continuous medication were lower than those of the control group, and the observation group had platelets, fibrinogen, etc. after 3 weeks of continuous medication The parameters of coagulation factors were better than those of the control group, and the differences were statistically significant (P < 0.05). Conclusion The effect of aspirin and clopidogrel dual antiplatelet therapy in patients with posterior circulation ischemic stroke is significantly better than that of aspirin alone.