Water sample storage tank

The utility model discloses a water sample storage box, which belongs to the field of storage boxes, and comprises a storage box, a foam block is fixedly arranged in the storage box, a plurality of slots are formed in the foam block, a lug plate is fixedly arranged on the left side of the upper end of a test tube, a plug cover is clamped at the upper end of the test tube, and a plug block is fixedly arranged at the lower end of the plug cover. A surrounding frame is fixedly arranged at the upper end of the outer side of the storage box, a box cover is rotationally clamped to the upper end of the storage box through a hinge, a protective pad is fixedly arranged in the box cover, a tool box is fixedly arranged on the left side of the upper end of the box cover, and an end cover is rotationally clamped to the upper end of the tool box through a hinge; the foam block is provided with a plurality of slots, test tubes are inserted into the slots in a sliding manner, the test tubes are limited and protected, the tes