The invention relates to the technical field of petroleum equipment and particularly discloses a combined corrosion-resistant wear-resistant high-temperature-resistant steel tube for petroleum cracking. The combined corrosion-resistant wear-resistant high-temperature-resistant steel tube for petroleum cracking comprises a steel tube body. A first high-temperature-resistant layer, a second high-temperature-resistant layer and a reinforcing layer are sequentially arranged on the steel tube body from inside to outside. A gap is arranged between the second high-temperature-resistant layer and thereinforcing layer. The gap is filled with sealing heat-insulation cement gum. The reinforcing layer is a steel wire body of an annular structure, and the steel wire body is formed by intertwining andweaving a plurality of steel wires. The outer surface of the reinforcing layer is coated with a corrosion-resistant layer. The inner wall of the first high-temperature-resistant layer is coated with alow-pressure polyethylene corrosion-resistant layer. The first high-temperature-resistant layer is a graphite layer. The second high-temperature-resistant layer is a modified organic silicon high-temperature-resistant heat-insulation layer. The combined corrosion-resistant wear-resistant high-temperature-resistant steel tube for petroleum cracking has the advantages of being high in temperature resistance and high pressure resistance, not prone to falling off, high in corrosion resistance and long in service life.