The utility model relates to an electric circular ring quantitative fertilizer applicator. The utility model discloses an electric circular quantitative fertilizer applicator, which belongs to the field of agricultural mechanical equipment and comprises a fixed shaft sleeve, a quantitative rotating shaft, a bearing, a left end cover, a right end cover, a motor bracket, a micro motor I, a micro motor II, a connecting plate, a fixed joint, a driven gear, a driving gear, a rotating joint, a fertilizer application pipe, a feeding pipe, a corrugated hose and a material box, according to the utilitymodel, granular fertilizers in the material box are quantitatively distributed through the quantitative rotating shaft; different growth periods of the tobacco seedlings are performed; the fertilizing amount can be adjusted through the amount adjusting block; the quantitatively distributed granular fertilizer is annularly applied to the periphery of the seedlings in the process that the micro motor II drives the fertilization pipe to rotate; the fertilizer applicator is simple in structure and convenient to operate, plays a role in annular fertilization, ensures that the root systems of tobacco seedlings can grow downwards, also realizes electric quantitative fertilization and accurate fertilization of each tobacco seedling, greatly reduces the labor intensity of manpower, and improves the fertilization efficiency and the utilization rate of the fertilizer.