Snowfield tire tread rubber composition and preparation method thereof

The invention provides a snow tire tread rubber composition and a preparation method thereof, belongs to the technical field of tire rubber compositions, and can solve the problem that the rolling resistance value of existing snow tire tread rubber is relatively large. The snow tire tread rubber composition is composed of the following components in parts by weight: 100 parts of matrix rubber and 100-200 parts of auxiliary components, the matrix rubber comprises 10-50 parts of butadiene-isoprene rubber, 10-20 parts of high vinyl polybutadiene rubber and 30-80 parts of solution polymerized styrene-butadiene rubber; the auxiliary components comprise 60-100 parts of high-dispersion white carbon black, 1-5 parts of carbon black, 2-10 parts of amino silicon oil, 2-10 parts of a silane coupling agent, 30-50 parts of heavy naphthenic oil, 3-7 parts of an active agent, 3-6 parts of an anti-aging agent, 1-3 parts of common sulfur and 1-4 parts of an accelerant. The tread rubber composition disclosed by the invention i