Diabetes causes many dangerous complications, including eye complications, especially retinopathy that can lead to blindness, so it is necessary to study to plan screening, intervention, and early treatment. Need to clarify the relationship between the duration of diabetes, the degree of glycemic control (glucose and HbA1c) management with Diabetic Retinopathy to serve as a basis for the screening and prevention of diabetic retinopathy so we carried out this study. Objectives: Analysis of some factors related to complications of diabetic retinopathy in patients with type 2 diabetes treated at Thai Nguyen national hospital. Methods: A coss-sectional descriptive study was performed on 126 patients with type 2 diabetes treated in Thai Nguyen National hospital. Results: The common age group is 60 years old and older accounting for 77.8%. Disease duration of more than 10 years accounted for 47.6%. The blood glucose control glucose and HbA1c target not achieved accounted for 66.7% and 64.3%. Conclusions: The duration of diabetes, the degree of glycemic control are related to diabetic retinopathy in patients with type 2 diabetes.