The invention provides a high-temperature-resisting automobile tire and a preparation method thereof. The preparation method comprises the following steps: 1) peeling green bamboos and crushing; thencalcining in the presence of protection gas to prepare bamboo charcoal; 2) roasting titanium dioxide, barium carbonate, lithium carbonate and the bamboo charcoal in the presence of the protection gas,so as to prepare modified barium metatitanate; 3) carrying out gelatinization treatment on tetraethylthiuram disulfide, starch, caryophyllene, methyl cellulose and water to prepare a modified vulcanizing agent; 4) carrying out primary mixing on butadiene rubber, a methacrylic acid-butadiene-styrene copolymer, polyethylene oxide, pentaerythritol triacrylate, glycerol, nano calcium carbonate, dimethyldiethoxysilane, zinc sulfide, benzoyl peroxide and sulfur; then adding the modified barium metatitanate and the modified vulcanizing agent and carrying out secondary mixing; finally, molding and cooling to prepare the high-temperature-resisting automobile tire. The automobile tire prepared by the method has excellent anti-ageing and high-temperature-resisting effects.