A unilateral tooth surface special abrasion-resistant strengthened gear quenching device is characterized in that the unilateral tooth surface special abrasion-resistant strengthened gear quenching device comprises a lifting device, a quenching device body and a fixed cooling device; the quenching device body is arranged at the bottom of the lifting device, and the fixed cooling device is in matched connection with the bottom of the quenching device body; the quenching device body comprises an induction heating wheel, the top of the induction heating wheel is connected with the bottom of the lifting device, and a plurality of heating blocks are arranged at the bottom of the induction heating wheel and conduct heating close to the unidirectional special gear; and the fixed cooling device comprises a fixed base and an oil spraying device arranged inside the fixed base, and the fixed base is connected with the unidirectional special gear. According to the unilateral tooth surface specialabrasion-resistant strengthened gear quenching device, quenching treatment is conducted on the large-load sides of the gear teeth of the special gear rotating with the unidirectional load, and sufficient elasticity can be ensured after the gear is effectively quenched, so that the gear is more not liable to fracture and resistant to abrasion when used, quenching is easier, and resources are savedduring quenching.