The invention discloses a cystatin C reagent bottle, which comprises a bottle body, a partition, a sealing film, an upper cork, a lower cork, an air bag, a puncture part, a ventilation hole, an annular groove and a marking ring; the bottle The lower end inside the body is fixed with a partition, and the partition divides the interior of the bottle body into two parts: the storage room and the installation room. The top of the storage room is provided with a bottle mouth, and the upper bottle stopper is installed at the bottle mouth; There is a through hole, and the sealing film is fixed at the through hole; the bottom end of the installation room is open, and the lower bottle stopper is installed at the opening; the air bag is fixed inside the installation room, and the air outlet hole on the top of the air bag and the through hole on the partition plate Connection, and the bottom of the airbag is provided with ventilation holes. The invention has novel structure, reasonable design, good dissolving effect of powdered medicine, easy pouring of reagents without residue, and avoids waste; in addition, the identification ring on the bottle is convenient for distinguishing different reagents, which greatly reduces the cost of each reagent bottle. chance of confusion.