Results: In 400 retinal images from the data file, the number of eyes without signs of DR (R0) was the highest with 241 eyes, accounting for 60.3%; the second highest belonged to moderate non-proliferative DR (R2) with 18.3%; mild non-proliferative DR (R1) accounted for 8%; severe non-proliferative DR (R3) and proliferative DR (R4) were the same ratio, accounted for 4, 3% and 4%, respectively; there were 21 substandard shots and could not be staged.