The invention discloses a high-strength carbon dioxide protecting surfacing flux-cored wire. The raw material of the wire is a common low-carbon cold rolled steel band, and the filled flux core powder accounts for 17 to 22 percent of the total weight of the wire. The flux core comprises 13 to 30 percent of rutile, 5 to 26 percent of fluoride, 3 to 14 percent of magnesia clinker, 0 to 10 percent of quartz, 2 to 8 percent of potassium feldspar, 2 to 5 percent of aluminum magnesium alloy, 14 to 33 percent of metal chrome, 5 to 15 percent of flake graphite, 2 to 5 percent of No.45 ferrosilicon, 7to 11 percent of metal manganese, 5 to 12 percent of ferromolybdenum, 0 to 6 percent of ferrovanadium, 0 to 5 percent of ferroboron, 6 to 12 percent of metal tungsten, 2 to 8 percent of rare earth and the balance of iron. In the invention, the wire welding process is advanced, the electric arc is stable during welding, all position welding is realized, slag covering is good, deslagging is easy, and the weld joint is elegant, no crack is formed after multiplayer welding, the impact resistance is high, the Rockwell hardness (HRC) of the welding layer can reach 55 to 61, and the wear resistance is high.