Clamp for mold

The invention discloses a clamp for a mold. The clamp for the mold solves the problems that in existing mold fixing, operation is inconvenient, the fixing efficiency is low and many potential safety hazards exist. A connection cavity of a clamp base is rotationally connected with a mounting base through a connection assembly; the clamp base is provided with a first locking piece; a mold clamping ring is arranged inside a mounting groove inside the mounting base; the mold clamping ring comprises a first semicircular clamping body and a second semicircular clamping body; the hinged ends of the first clamping body and the second clamping body are hinged; the joint ends of the first clamping body and the second clamping body are detachably connected through a connection mechanism; the first clamping body or/and the second clamping body is/are movably installed inside the mounting groove; and the first clamping body or the second clamping body is provided with a second locking piece. The mounting base can rotate o