The invention relates to the field of coking resistance, in particular to an anti-coking alloy material, a method for preparing the anti-coking alloy material and an anti-coking splitting furnace tube. The anti-coking alloy material comprises an alloy material matrix and a coating layer, wherein the surface of the alloy material matrix is coated with the coating layer. The coating layer comprisesmetal oxides and metal sulfides of metal elements in the alloy material matrix, compared with the size of the coating layer, the content of the metal oxides is 65-75% of the size, and the content of the metal sulfides is 25-35% of the size. According to the anti-coking alloy material, coking can be effectively inhibited, and the anti-coking performance can be kept for a long time.