Universal structure of dissolution cup

The utility model discloses a universal structure of a dissolution cup, which comprises a cup plate, a plurality of first fixing units and a plurality of second fixing units, each first fixing unit comprises a first positioning sleeve, a first cup cover used for sealing the large dissolution cup and a first presser used for vertically pressing the first cup cover and the upper edge of the large dissolution cup, and a first through hole allowing the first stirrer to penetrate through is formed in the first cup cover. Each second fixing unit comprises an adapter ring, a second positioning sleeve, a second cup cover used for sealing the adapter ring and a second presser used for vertically pressing the second cup cover and the upper edge of the adapter ring, the adapter ring is used for fixing the small dissolution cup, the adapter ring is in a vertically-through barrel shape, and the upper edge of the adapter ring is clamped and embedded in the second ring groove. And a second through hole for the second stirre