The invention discloses a cutter ring of an electroplated diamond hobbing cutter. The cutter ring comprises a cutter ring matrix and a diamond wear-resistant layer electroplated onto the outer surface of the circumference of the cutter ring matrix, wherein the cutter ring matrix comprises the raw materials in percentage by mass: 0.38-0.48% of C, 0.6-0.8% of Si, 1.20-1.55% of Mn, 2.7-3.5% of Cr, 2.6-3.4% of Mo, 1.05-1.40% of V, less than or equal to 0.02% of impurities P, less than or equal to 0.02% of impurities S and the balance Fe. The invention also discloses a processing technology of the cutter ring of the electroplated diamond hobbing cutter. The processing technology disclosed by the invention is simple in method as well as high in operability and efficiency; and the cutter ring of the electroplated diamond hobbing cutter, processed by using the processing technology, is not only meticulous in surface and low in impurity content, but also high in wear resistance and long in working life.