A method and device for manufacturing a surface modification layer of a metal material, using an ion implantation method to modify the surface of a metal material with WS2 as a target, the manufacturing method includes pretreatment of the metal material; putting the metal material into a vacuum chamber , using the ion implantation method to generate a surface modification layer of the metal material with WS2 as the target material; the metal material after the surface modification layer is generated is cleaned, dried, and vacuum-sealed. The invention also discloses a metal material surface modification layer manufacturing device used in the manufacturing method. The invention uses ion implantation technology to prepare a tungsten disulfide solid lubricating functional layer on the metal surface, which can significantly reduce the surface friction coefficient of the workpiece without changing the size of the workpiece, and can be used for high temperature, high pressure, high vacuum, high load, high speed, high Lubrication of parts under harsh conditions such as radiation, strong corrosion, and ultra-low temperature.