The invention discloses a corrosion-resistant high-toughness flux-cored wire. The corrosion-resistant high-toughness flux-cored wire is composed of a flux core and a stainless steel outer skin coating the outer side of the flux core. The flux core comprises the components in percentage by mass: 0.1-0.2% of C, 0.6-0.9% of Si, 0.1-0.3% of Mg, 0.2-0.4% of Al, 0.3-0.6% of B, 1.2-2% of Mn, 3.5-5% of Ni, 14.5-19% of Cr, 1.8-2.5% of Ti, 0.05-0.15% of Sr, 0.08-0.15% of Mo, 0.04-0.12% of V, 0.02-0.35% of Zr, 0.08-0.15% of Nd, 0.01-0.02% of Sc and the balance Fe and inevitable impurities. The corrosion-resistant high-toughness flux-cored wire disclosed by the invention is good in toughness, hardness, strength, corrosion resistance and wear resistance, and the service life of a metal member is prolonged.