The invention discloses a high-hardness support sealing ring rubber material, which comprises the following raw materials in parts by weight: 40-60 parts of natural rubber, 40-60 parts of butadiene-styrene rubber, 1.5-3.5 parts of sulfur, 2-4 parts of an accelerant, 3-5 parts of zinc oxide, 1-4 parts of stearic acid, 7-13 parts of tackifying resin, 120-170 parts of general carbon black, 4-8 partsof an anti-aging agent. 1-3 parts of paraffin, 1-3 parts of a dispersing agent, 0.5-2.5 parts of an anti-scorching agent and 2-5 of pine tar; wherein the accelerant comprises an accelerant CZ and an accelerant DM. The rubber material has the advantages of high hardness, favorable sealing performance, high support strength, excellent water resistance, excellent wear resistance and long service life, and can satisfy the requirements for long-term use.