Clamp capable of clamping cylinders in batches and automatically adjusting size

The utility model discloses a clamp capable of clamping cylinders in batches and automatically adjusting the size, a clamping module comprises a connecting rod and a clamping unit formed on the connecting rod, and the connecting rod is in sliding connection with a base; each clamping unit comprises a fixed part and a movable part, the movable parts are installed on the connecting rods, the fixed parts are installed on the base, and clamping cavities are formed between the fixed parts and the movable parts; a driving end is arranged on the movable part and/or the connecting rod, and is used for driving the movable part and/or the connecting rod during clamping movement, so that the clamping cavity is shrunk to clamp the cylindrical clamp. Parts with different cylinder sizes or blank boundary dimensions can be conveniently clamped at the same time, and the manufacturing efficiency of the parts is improved. The clamping device has the advantages that cylindrical parts can be clamped in batches, machining and man