The invention provides a styrene butadiene rubber anti-aging type softening agent preparation method, which comprises: dissolving styrene butadiene rubber into a solvent to prepare a solution, addingan olefin double-decomposition catalyst and a coke-proof rubber anti-aging agent, and carrying out solvent removing on the rubber solution after the reaction to obtain the anti-aging type softening agent product. According to the present invention, after 1-100 parts of the anti-aging type softening agent is added to the styrene butadiene rubber SBR 1500 in the open mill, the test results show thatthe Mooney viscosity of the base rubber is reduced by 0.2-2.0 unit/part, and the tensile strength is reduced by 10-30% and the scorch time is delayed by 1-15 s/part in the presence of the anti-agingtype softening agent while the tensile strength is reduced by 40-60% in the absence of the anti-aging type softening agent.