The invention discloses a novel material large-diameter annealing machine. The machine comprises a preannealing wheel, a guide wheel 1, a guide wheel 2, a guide wheel 3, an upper annealing wheel, a lower annealing wheel, a fixed-speed wheel and a guide wheel 4 for leading out a wire, which enable the wire to pass through in sequence, wherein a preheating section is from the preannealing wheel to the upper annealing wheel; an annealing section is from the upper annealing wheel to the lower annealing wheel; and a cooling section is from the lower annealing wheel to the guide wheel 4. The machine is characterized in that a cooling tank in the cooling section is horizontally placed; a plate heat exchanger is arranged in a cooling liquid circulating system of the cooling section; and eight sets of carbon brushes are arranged on a carbon brush wheel adopted by the large-diameter annealing machine. An air cooling system is arranged on the carbon brush wheel. The length of the preheating section is 9800-10000 mm. The length of the cooling section is 2225-2435 mm. The diameters of the upper annealing wheel and the lower annealing wheel are phi 440-phi 460 mm.