The invention discloses a high-carbon high-chrome high-vanadium wearable surfacing self-shielded flux-cored wire. According to the flux-cored wire, the core is prepared from the following components in mass percentage: 5-25% of high carbon ferro-chrome, 30-60% of chromium carbide, 15-35% of ferrovanadium, 0.5-5% of ferromolybdenum, 1-4% of electrolytic manganese, 1-4% of ferrosilicon, 1-4% of ferroboron, 1-5% of graphite, 1-5% of aluminium magnesium, 0-3% of zircon sand, 0-4% of marble, 0-3% of barium fluoride, 0-5% of barium carbonate, 0-3% of sodium fluosilicate, and 0-5% of fluorite; the skin of the flux-cored wire is a mild-carbon steel strip, the diameter is 1.6-4.0mm, and the counterweight ratio is 44-53%. According to the flux-cored wire disclosed by the invention, the rigidity and wearability of surfacing alloy can be greatly improved and the toughness of the surfacing alloy cannot be reduced; and the prepared surfacing alloy can be widely applied to surfacing repair of parts with severe low and intermediate stress abrasion at low temperature, intermediate temperature and high temperature and manufacture of new parts.