A solution polymerized styrene-butadiene rubber-polyurethane elastomer material for a high-performance tire, which is characterized in that the elastomer material is prepared by performing cast molding on: a soft segment and a hard segment in a mass ratio of 100:; the soft segment is hydroxyl-terminated solution polymerized styrene-butadiene rubber prepared by an anionic polymerization; the hard segment comprises isocyanate, a small-molecule polyol chain extender and a cross-linking agent; the isocyanate is 4,4-diphenylmethane diisocyanate or 1,5-naphalene diisocyanate or toluene-2,4-diisocyanate; the small-molecule polyol chain extender is 1,4-butanediol or ethylene glycol; the cross-linking agent is trimethylolpropane or glycerin; a mass ratio of the soft segment to the isocyanate is 100:; a mass ratio of (the soft segment + the isocyanate) to (the chain extender + the cross-linking agent) is 100:; a mass ratio of the chain extender to the cross-linking agent is 100:; a molecular weight of the soft segment is 1000-8000; a glass-transition temperature of the soft segment is -20°C to -30°C as measured with DSC; the soft segment is prepared by a method comprising the following steps: preparation of a dilithium initiator, namely taking cyclohexane and tetrahydrofuran as solvents, and reacting isoprene and lithium metal under an ice-water bath condition to produce the dilithium initiator; distillation and purification of ethylene oxide; and performing a synthetic reaction on butadiene, styrene and the dilithium initiator at a reaction temperature of 45-55°C for 3.5-4.5 h, cooling a reactor to a room temperature, adding ethylene oxide serving as an end-capping reagent, and reacting for 12-14 h to produce hydroxyl-terminated solution polymerized styrene-butadiene rubber; wherein, a mass ratio of butadiene to styrene is 100:; a mass ratio of ethylene oxide to active lithium is 100:; and a mass ratio of the active lithium to (butadiene + styrene) is 1:. a soft segment and a hard segment in a mass ratio of 100:; the soft segment is hydroxyl-terminated solution polymerized styrene-butadiene rubber prepared by an anionic polymerization; the hard segment comprises isocyanate, a small-molecule polyol chain extender and a cross-linking agent; the isocyanate is 4,4-diphenylmethane diisocyanate or 1,5-naphalene diisocyanate or toluene-2,4-diisocyanate; the small-molecule polyol chain extender is 1,4-butanediol or ethylene glycol; the cross-linking agent is trimethylolpropane or glycerin; a mass ratio of the soft segment to the isocyanate is 100:; a mass ratio of (the soft segment + the isocyanate) to (the chain extender + the cross-linking agent) is 100:; a mass ratio of the chain extender to the cross-linking agent is 100:; a molecular weight of the soft segment is 1000-8000; a glass-transition temperature of the soft segment is -20°C to -30°C as measured with DSC; the soft segment is prepared by a method comprising the following steps: preparation of a dilithium initiator, namely taking cyclohexane and tetrahydrofuran as solvents, and reacting isoprene and lithium metal under an ice-water bath condition to produce the dilithium initiator; distillation and purification of ethylene oxide; and performing a synthetic reaction on butadiene, styrene and the dilithium initiator at a reaction temperature of 45-55°C for 3.5-4.5 h, cooling a reactor to a room temperature, adding ethylene oxide serving as an end-capping reagent, and reacting for 12-14 h to produce hydroxyl-terminated solution polymerized styrene-butadiene rubber; preparation of a dilithium initiator, namely taking cyclohexane and tetrahydrofuran as solvents, and reacting isoprene and lithium metal under an ice-water bath condition to produce the dilithium initiator; distillation and purification of ethylene oxide; and performing a synthetic reaction on butadiene, styrene and the dilithium initiator at a reaction temperature of 45-55°C for 3.5-4.5 h, cooling a reactor to a room temperature, adding ethylene oxide serving as an end-capping reagent, and reacting for 12-14 h to produce hydroxyl-terminated solution polymerized styrene-butadiene rubber; wherein, a mass ratio of butadiene to styrene is 100:; a mass ratio of ethylene oxide to active lithium is 100:; and a mass ratio of the active lithium to (butadiene + styrene) is 1:.