The invention discloses a production line of special section wing rail and a manufacturing method thereof. The production line comprises a cogging mill and a universal machine set, and is characterized in that the cogging mill comprises an asymmetrical caliber which leads a working edge of a railhead of the special section wing rail is arranged toward the direction below a rolling line, support platforms are mounted on an upper guide and a lower guide at an outlet side of a second edger and a universal finishing mill of the universal machine set to control tapping torque. By adopting the invention, the problems such as reversing, bending and the like caused by uneven deformation due to the asymmetrical section of the special section wing rail can be effectively controlled, and the specialsection wing rail with a 75m length can be manufactured, which has stable product quality and can satisfy the requirement of high-speed railway construction.