The invention discloses a method for manufacturing an X80MS-HFW welded tube with favorable SSCC stress corrosion resistance. The method mainly comprises the following steps: uncoiling and butt welding, edge planing, molding, high-frequency welding, heat treatment, sizing shearing, tube cutting, straightening and the like. The residual stress after molding is controlled to be -30-0 mm, the frequency of high-frequency welding is 420+/-30 KHZ, the welding speed is 18+/-5 m/min, the heat treatment normalizing temperature is 930-950 DEG C, and particularly, the cooling speed after heat treatment is 2-3 DEG C/s. The reasonable molding process is adopted to ensure I-shaped butt joint of plate edges and end surfaces, and residual stress generated in the molding process is reduced; a large extruding force, a small extruding quantity and a small opening angle are adopted, welding power parameters are reduced, and uniform burrs are formed on the inner surface and the outer surface of the welded tube in the welding process; the X80MS-HFW welded tube manufactured by the method is high in strength and tenacity, base metal and welding seam textures are uniform and consistent, and an SSCC test in a solution A shows that when a 90% SMYS (500 MPa) stress level is loaded, no crack or split appears on the tensile surface of a sample.