Finished tire and preparation method thereof

The invention provides a finished tire and a preparation method thereof. The preparation method comprises the following steps: carrying out first vulcanization treatment on a mixed rubber material to obtain a tread half part; carrying out second vulcanization treatment and first molding treatment on the mixed rubber material to obtain a molded tire body; performing third vulcanization treatment and second molding treatment on the tread half part and the molded tire body to obtain a finished tire; the temperature of the first vulcanization treatment is lower than that of the second vulcanization treatment, and the weight ratio of the tread half part to the formed tire body is (20-40): 100. The tread half part is thin, the first vulcanization treatment temperature is low, and the mixed rubber material has enough time to flow in a mold, so that the mixed rubber material can be tightly combined with a molded tire body in the third vulcanization process, and the problems of molded joint cracking and rubber shortag