Tire sidewall rubber composition for tire with high-quality appearance, preparation method and application of tire sidewall rubber composition and tire

The invention belongs to the field of rubber tire manufacturing, and relates to a tire sidewall rubber composition for a high-quality appearance tire, a preparation method and application of the tire sidewall rubber composition, and the tire. Based on 100 parts by weight of rubber, the rubber composition is prepared by mixing the following raw materials: 30-50 parts of natural rubber, 50-70 parts of polybutadiene rubber, 5-35 parts of high molecular weight reclaimed rubber, 30-50 parts of carbon black, 2-8 parts of softening oil and 1-3 parts of resin, the high-molecular-weight reclaimed rubber material is prepared by pretreating waste rubber powder, a softening agent and an activating agent in a stirrer and then carrying out desulfurization reaction in a screw extruder, the molecular weight Mn of the high-molecular-weight reclaimed rubber material is 12000-18000 g/mol, and the sol content is 30%-50%. The low-temperature desulfurized high-molecular-weight reclaimed rubber is applied to the sidewall formula, s