Objective To investigate the diagnosis and clinical characteristics of vitreous hemorrhage in branch retinal vein occlusion(BRVO)fundus fluorescein angiography(FFA)as the first symptoms.Methods A retrospective analysis of the FFA characteristics and clinical data of 97 cases(97 eyes)with BRVO cases which had vitreous hemorrhage as the first symptom treatment.Results Of 97 eyes of vitreous hemorrhage,respectively:Class I vitreous hemorrhage 38,accounted for 39.18％,Class Ⅱ,Ⅲ vitreous hemorrhage 59,accounted for 60.82％.Retinal vascular white sheath 67,accounted for 69.07％.All patients were BRVO with clear diagnosis by FFA.FFA showed that there was occlusion area capillary large block,block area edge to expand capillary tumor samples in all cases.The size and number of retinal neovascularization were found in 81 eyes(83.51％),BRVO 66 eyes on the temporal,accounted for 68.04％; Under the temporal BRVO 13 eyes 13 eyes,accounted for 13.40％; On the nose of BRVO 11 eyes,accounted for 11.34％; Under the nose of BRVO 7 eyes,accounted for 7.22％.Blocking venous branch level:Primary branches were 18 eyes,which were a branch the nasal vein branches,accounted for 18.56％.Secondary and tertiary branches were of 79 eyes,which were peripheral branch of the temporal side of the vein,accounted for 81.44％.With proliferation of membrane 13 eyes,accounted for 13.40％; retinal detachment 10,accounted for 10.31％.Conclusions BRVO cases of vitreous hemorrhage as the first symptom are the peripheral branch of the nasal vein branch retinal vein branch and the temporal side of the vein branches and are asymptomatic before the vitreous hemorrhage,vitreous hemorrhage for grade Ⅰ-Ⅲ level.FFA can confirm the diagnosis.The crowd of the disease has occurred among middle-aged and old hypertension.