The invention discloses a preparation method of a corrosion-resistance stainless steel wire easy to mold. The stainless steel wire has a diameter of 4.9-5.1 mm, and comprises the following components in percentage by mass: 0.05-0.1% of contain, 19-21% of chromium, 4-8% of nickel, 0.1-0.12% of copper, 0.4-0.5% of tungsten, 0.4-0.5% of magnesium, 0.1-0.12% of molybdenum, and the balance of iron. The prepared stainless steel wire is high in corrosion resistance and wear resistance and easy to machine and mold, preferably solves the problems of easiness in corrosion, rust and wear, and prolongs the service life.