AIM:To study the clinical curative effect of vitrectomy for vitreous hemorrhage in branch retinal vein occlusion.METHODS:Twenty-eight cases 28 eyes of vitreous hemorrhage caused by branch retinal vein occlusion were taken into investigation.All the patients accepted routine three-way joint vitrectomy combined with membrane peeling,diathermy,retinal photocoagulation and silicon or gas or fluid tamponade.RESULTS:The branch retinal vein occlusion seemed to be vascular sheathing in 28 eyes.The occlusion areas were supertemporal quadrant in 20 eyes,infratemporal quadrant in 8 eyes.2 eyes had disc neovascularization,18 eyes had retinal neovascularization in the areas of retinal vein occlusion.Retinal detachment was found in 7 eyes.The postoperative visual acuity was better than that of preoperative.CONCLUSION:Vitrectomy is an effective way for branch retinal vein occlusion with vitreous hemorrhage.The proliferation should be carefully removed.