Optical coherence tomography angiography(OCTA)is a noninvasive angiography technique developed in recent years. Without using contrast medium, this technology can quickly and safely get retinal vascular images with relatively high-resolution. It has been widely used in the diagnosis and management of eye diseases, especially in the vascular diseases, such as diabetic retinopathy(DR), age-related macular degeneration(AMD), retinal central/branch venous obstruction(CRVO/BRVO), choroidal neovascularization(CNV), etc. This article reviews the clinical application of OCTA in diabetic retinopathy.