Abstract: Mesenchymal stem cells (MSC) are considered to have important value in the treatment of various diseases because of their low immunogenicity,transferability,and strong tissue repair capacity.Stromal cell derived factor-1 (SDF-1) and its receptor CXC chemokine receptor 4 (CXCR4) pathway plays an important role in migration of MSC.The induction of homing of MSC to retina by regulating SDF-1/CXCR4 may exert the curative effect on diabetic retinopathy to greatest exent.