Water quality sample storage device

The utility model relates to the technical field of water quality sample storage, and discloses a water quality sample storage device which comprises a storage box, a fixing frame is arranged in the storage box, a fixing device is arranged in the fixing frame, and the fixing device comprises a supporting plate, a supporting block, a first air bag, a second air bag, a ventilation pipe, a supporting rod, a base, a U-shaped rod and a protection device. By arranging the fixing device, a sample tube in the fixing frame can be conveniently fixed and supported, a user can place the sample tube needing to be detected into the fixing frame, and at the moment, the base is extruded through the weight of the sample tube, so that the base moves downwards and drives a supporting rod to move downwards; the supporting rod moves downwards to drive a U-shaped rod on the side wall of the supporting rod to move downwards to extrude a second air bag, and at the moment, gas in the second air bag enters a first air bag through a ve