Adjustable mechanical clamp

The invention discloses an adjustable mechanical clamp, and relates to the technical field of mechanical equipment. The device comprises a fixing shell, and a clamping mechanism used for clamping a workpiece is installed in the fixing shell; the clamping mechanism comprises a first connecting plate, first limiting rods, second limiting rods, a fixing plate, first limiting blocks and a connecting assembly, the first limiting rods are fixed to the bottom ends of the two sides in the fixing shell, the second limiting rods are fixed to the top ends of the two sides in the fixing shell, and the first limiting blocks are slidably connected to the outer sides of the first limiting rods and the outer sides of the second limiting rods; a fixing plate is fixed to the top of the first limiting block. Through cooperation of a transmission threaded section, a fixing plate, a second connecting plate and a connecting assembly, the clamp can conveniently clamp workpieces with different widths during use, and through cooperat