The invention discloses a brazing material for repairing an anode steel claw and a preparation method thereof. The brazing material comprises tubular brazing filler metal and semi-ring-shaped brazingfiller metal, a corrosion section of an anode steel claw head to be repaired is cut off, a boss is machined at the lower end of the anode steel claw head to be repaired, a groove is machined in the upper end of round steel replacing the corrosion section, the tubular brazing filler metal is placed in the groove, and the semi-ring-shaped brazing filler metal is placed on the edge of the groove; thetubular brazing filler metal is formed by folding a brazing filler metal thin strip with the surface coated with a brazing flux layer for multiple times in the length direction to form short strip-shaped brazing filler metal with the brazing filler metal and brazing fluxes mutually alternately and then carrying out winding by taking a short edge as a shaft; the semi-ring-shaped brazing filler metal is formed by cutting a brazing filler metal thin strip with the surface coated with a brazing flux layer into semi-ring-shaped brazing filler strips and then carrying out multi-layer overlaying; and the brazing filler metal thin strip comprises, by weight, 50-55 parts of copper, 37.5-41 parts of zinc, 3.6-4.3 parts of manganese, 1.9-2.6 parts of cobalt, 0.7-0.95 part of iron, 1.6-1.9 parts of copper-plated graphene and 0.1-0.3 part of microelements. The brazing material is specially used for repairing the anode steel claw, the resistivity of the repaired steel claw is remarkably reduced, and the repaired steel claw is good in conductivity, high in strength, and long in service life.