Objective:To investigate clinical effect of Yunnan Bai Yao capsules on retina vein obstrction.Methods:60 cases with retina vein obstruction(60 eyes)were randomly to divided two groups,the experimental group was gaven large dose of Yunnan Bai Yao capsules and vasodilative drug,the control group only gaven vasodilative drug.The follow-up was 6 months.Results:The experimental group 30 cases(30 eyes),23 cases visual acuity improved,bleeding absorbed,no bleeding again,effective power 76.7%.The control group 30 cases(39 eyes),only 14 cases visual acuity improved,effective power 46.7%.There were significant statistical differences between the experimental group and control group(P<0.05).Conclusions:The Yunnan bai Yao capsules was a good,safe,easy-operated,effective methed to treat retina vein obstruction and was worth of popularizing.