Sample storage tube

The utility model discloses a sample preservation tube which comprises a tube body, a round sliding groove is formed in the upper surface of the tube body, a tube cover is connected to the inner cylindrical surface of the sliding groove of the tube body in a sliding mode, a sliding-in ring is arranged on the lower surface of the tube cover, and the outer side of the sliding-in ring on the lower surface of the tube cover is conical. A circular groove is formed in the sliding-in ring on the lower surface of the pipe cover and fixedly connected with a rubber disc, the diameter of the rubber disc is larger than that of the inner pipe wall of the pipe body, a circular containing groove is formed in the surface of the bottom of the circular sliding groove of the pipe body, and a sealing disc is arranged in the circular containing groove in the pipe body. And the upper surface of the sealing disc is in close contact with the lower surface of the rubber disc. By means of the structure, through the arrangement of the