Clamp for polishing metal shell

The utility model relates to the technical field of metal shell processing, and discloses a clamp for polishing a metal shell, a connecting mechanism is arranged outside a second bottom plate and a first bottom plate, the connecting mechanism comprises a first connecting plate and a second connecting plate, and the first connecting plate and the second connecting plate are arranged outside the second bottom plate and the first bottom plate from front to back; a metal shell is arranged on the upper surface of the second bottom plate and the upper surface of the first bottom plate, fixing plates are arranged on the portions, on one side of the metal shell, of the upper surfaces of the second bottom plate and the first bottom plate, clamping mechanisms are symmetrically arranged on one sides of the fixing plates, and clamping plates are arranged at one ends of the clamping mechanisms. A clamping mechanism is installed between a clamping plate and a fixing plate, when an electric telescopic rod arranged in an adj