Objective:To observe the clinical efficacy of Chaihu Liuwei Decoction in the treatment of migrainous vertigo. Methods68 patients with migrainous vertigo were randomly divided into the control group and treatment group,34 cases in each group. The control group was treated with flunarizine hydrochloride capsules,and the treatment group was treated with flunarizine hydrochloride capsules and Chaihu Liuwei Decoction. The changes on Chinese medical scores,scores of quality of life and headache index score were observed in both groups.  Results:①After treatment,the Chinese medical scores were decreased in both groups compared with treatment before(P<0.05),and the scores of the treatment group were lower than those of the control group(P<0.05). ②After treatment,the scores of quality of life were obviously increased in both groups(P<0.05),and the scores of the treatment group were higher than those of the control group(P<0.05). ③After treatment,the headache index score was obviously decreased in both groups(P<0.05),and the score of the treatment group was lower than that of the control group(P<0.05).  Conclusion:Chaihu Liuwei Decoction can obviously improve the headache and other symptoms in the treatment of migrainous vertigo,and enhance the life quality of patients.