Gripping device of apparatus for extracting bioactive substances

The utility model provides a gripping device of an apparatus for extracting bioactive substances through a magnetic bar method. The gripping device is characterized by comprising a machine frame and a gripping mechanism, wherein the machine frame is provided with a square frame; the gripping mechanism comprises two rotating shafts and a plurality of fixed nails; the rotating shafts can rotate to drive the fixed nails fixed on the rotating shafts to synchronously rotate towards the inner side of the machine frame, and therefore, the fixed nails are separated from or inserted into a bump on a sleeve plate.