The invention discloses an automobile fuel rubber pipe outer rubber and a preparation method thereof, and relates to the rubber product technical field; the automobile fuel rubber pipe outer rubber is mainly prepared from natural latex, butadiene rubber, a garlic essential oil, stearic acid, an anti-aging agent RD, a coupling agent Si69, bisphenol A unsaturated polyester resin, diisooctyl succinate sodium sulfonate, zinc oxide, titanium carbide, waste molding sand, laterite, dioctyl phthalate, a silicon boride micro-powder, epoxidized soybean oil, a modified additive and the like. The automobile fuel rubber pipe outer rubber has good reinforcing performance; a prepared rubber pipe has the advantages of high strength, good resistance to impact toughness, difficult bubbling and deformation, good high-temperature resistance, good aging resistance, good fuel oil resistance and low fuel oil permeability; and with use of the modified additive, the rubber pipe performance is improved overall, and the service life of the rubber pipe is improved.