Metal material polishing device

The utility model discloses a metal material polishing device, and relates to the field of metal polishing. According to the technical scheme, the metal material polishing device comprises a bottom plate and is characterized in that the top of the bottom plate is fixedly connected with a supporting plate, one side of the supporting plate is rotationally connected with a rotating rod through a rotating shaft, one end of the rotating rod is slidably connected with a polishing machine for polishing metal materials, and a sliding plate is longitudinally slidably connected into the bottom plate; and a clamping mechanism for clamping the metal material is arranged on the sliding plate. The rotating rod is rotated to the inclination angle needing to be ground, then the first bolt is rotated to fix the inclination angle, and therefore the situation that grinding errors are possibly caused when a person holds the grinding machine by hand for a long time is avoided; the metal material is fixed to the sliding plate, the