The invention discloses a hydraulic forming device of a damping rubber ring and a production technology of the damping rubber ring. The production technology of the damping rubber ring comprises the steps of manufacturing a steel ring, wherein material preprocessing and shearing are conducted, and a mold is rolled; preprocessing the steel ring, wherein the outer appearance of the steel ring is detected, passivation treatment is conducted on the steel ring, and sand blast is conducted on the inner ring of the steel ring; conducting spray coating on the inner ring of the steel ring, wherein a spray coating agent is prepared in the manner that absolute ethyl alcohol and Thinkbond4 are evenly mixed, the concentrate of the absolute ethyl alcohol in the prepared spray coating agent is larger than 99%, the water content is smaller than 0.1%, and spray coating treatment is conducted on the inner ring of the steel ring; and conducting combination by means of the vulcanization technology, wherein the hydraulic forming machine is utilized to conduct extrusion formation on silica gel and the steel ring. According to the damping rubber ring produced by the adoption of the production technology,on the basis of an original rubber ring, the steel ring is additionally arranged, so that the fatigue resistance of the damping rubber ring is improved, the service life is prolonged, the work efficiency is improved, and the labor intensity of work personnel is lowered; the steel ring is coated with the spray coating agent formed by evenly mixing the absolute ethyl alcohol and Thinkbond4, and therefore the efficiency of the vulcanization technology is improved; and the spray coating agent has ultrahigh adhesive force, and therefore the quality of the product is improved.